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algebra

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Espaces vectoriels 2002-08-18
Bacar pose la question :
Comment montrer que trois (ou plus que trois) sous espaces vectoriels sont en somme directe.
Claude Tardif lui répond.
Les equations 1999-12-09
Enciso Alberto pose la question :
j'ai les equations suivantes:

X1=Rs + A1/(B+W^2)
X2=Rs + A2/(B+W^2)
X3=Rd + A3/(B+W^2)
X4=Rd + A4/(B+W^2)
X5=Rg + A5/(B+W^2)
X6=Rg + A6/(B+W^2)

dont les coefficients Ai (i=1,2,..) et B sont constants (mais on ne conais pas leur valeur) et Rs, Rd, et Rg sont inconnues. Nous pouvons constater que la dependence de ces differentes expessions en fonction de W^2 est identique. Le tracé de l'une de ces expressions en fonction d'une autre est donc une driote.
.
.
.
Claude Tardif lui répond.

Macy and Camile's ages 2017-09-30
carolyn pose la question :
macy is 2 years older than Camille twice the sum of their ages is 52 which equation can be used to find camilles age x
Penny Nom lui répond.
(x-18)/7=6 2017-08-08
David pose la question :
(x-18)/7=6
Penny Nom lui répond.
A police officer spots a speeding car 2017-07-20
Josh pose la question :
Marie, a police officer, spots a speeding car and starts chasing it. The speeding car travels at a speed of 130 feet per second. Marie's car reaches a constant speed of 145 feet per second 1725 feet from the start of the chase. During that time, the speeding car has traveled 3150 feet. Write a system of equations to represent this situation.
Penny Nom lui répond.
Catherine, Molly and Tom 2017-07-19
liezel pose la question :
what is the answer of this problem, If Catherine and molly has 320pesos altogether, Molly and tom have 360 in all. Tom and Catherine have 240pesos altogether.How much does each of them have?
Penny Nom lui répond.
y = g(x + 1) 2017-06-27
Shamsudiin pose la question :
HI there i am currently doing a level maths AS

I don't understand how to graph this Question y=g(x+1) i really need help please please respond to this problem

Penny Nom lui répond.
Algebra 2017-05-28
Kerim pose la question :
I need to solve this equation.
y=at^2 - 2at
x =2a√t

Express y in terms of x and a

Give in the form y=(x^p/ma^3) - (x^q/na) where p,q,m and n are integers

Penny Nom lui répond.
Jamie has twice as many video games as Mel. 2017-04-27
John pose la question :
Jamie has twice as many video games as Mel. Together, the boys have 24 games. how many games do each boy have
Penny Nom lui répond.
Express x/a -2a/x =-1 in terms of a. 2017-04-14
tony pose la question :
express x/a -2a/x =-1 in terms of a.
Penny Nom lui répond.
13 - 3x = x times the square root of 5 2017-03-29
Kevin pose la question :
A student I am tutoring was sent this question from his teacher.

Solve for x: 13 - 3x = x times the square root of 5

Penny Nom lui répond.
A total amount of $27,500 invested at 5% and 7% 2017-02-19
Brad pose la question :
Kristina invests a total of $27,500 in two accounts paying 5% and 7% simple interest, respectively. How much was invested in each account if, after one year, the total interest was $1,645.00.
Penny Nom lui répond.
Five equations 2017-01-16
Muhammed pose la question :
A x 4 = E
B ÷ 4 = E
C + 4 = E
D - 4 = E
___________
& A + B + C + D = 100
what is the value of E

Penny Nom lui répond.
Renting an electric cart 2017-01-07
Desiree pose la question :
Vacation Rentals rents electric carts for travel on their grounds. The economy plan rents carts for $26 per day and the premium plan rents a carts for $12 per day plus a one time fee of $126.05
For how many whole days would it be cheaper to rent from the economy plan then from the premium plan?

Penny Nom lui répond.
Joining a fitness center 2016-12-18
Salem pose la question :
A fitness center offers a special price for group-class students. The cost of registration is 30 dollars and then you have to pay 25 dollars per month. What is the rule of the equation in the light of
c=---m+----?

Penny Nom lui répond.
1/1-cosine(2x) - 1/1+ cos(2x) 2016-12-14
Sean pose la question :
1/1-cosine(2x) - 1/1+ cos(2x)
Penny Nom lui répond.
3^2x-5=27 2016-12-14
danaja pose la question :
solve for the following 3^2x-5=27
Penny Nom lui répond.
A stone walkway around a garden 2016-11-27
Abigail pose la question :
A garden measures 12 feet by 16 feet. The family would like to add a stone walkway around the garden. This would increase the total area of to 302.25 square feet. what will be the width of the of the walkway
Penny Nom lui répond.
An equation with fractions 2016-11-09
Tina pose la question :
How do you solve x+1/3=x+2/5. X+1 divided by 3= x+2 divided by 5. What's x=
Penny Nom lui répond.
Standard form 2016-09-22
anna pose la question :
ok. i have b=2/3x+5/7. im supposed to change it to standard form. how do i do that?
Penny Nom lui répond.
Two equations 2016-09-17
Nilesh pose la question :
How to solve (x-y)^1/2 + 3(x-y) = 30 ; xy + 3(x-y) = 11?
Penny Nom lui répond.
Todd Matt and Jeff 2016-08-30
Lisa pose la question :
Three brothers spent different amounts of money on their recent vacation.
Matt spent $25 less than Todd.
Jeff spent 3 times as much as Matt.
How much did each brother spend if they spent a total of $275?

Check answer required
T= Todd

Penny Nom lui répond.
I bought 3 books for $150.00 2016-08-20
Shavon pose la question :
if i bought 3 books for $150.00 and 1 of the books cost 50% more than both other books combined what's the price of the more expensive book?
Penny Nom lui répond.
Carlos, Mark, Jeremy, and Alan collect Yugioh cards 2016-08-08
justin pose la question :
Carlos, Mark, Jeremy, and Alan all collect Yugioh cards. Mark has twice as many cards as Jeremy. Carlos has 3 times as many cards as Jeremy, and Alan has collected 12 less than 3 times as many cards as Jeremy. Together the four players have collected 456 cards. How many does each person have?
Penny Nom lui répond.
The dimensions of a rectangle 2016-07-25
Krunox pose la question :
A rectangle is twice as long as it is wide. Its perimeter (the sum of the lengths of its sides) is 60 cm. Find its length and width.
Penny Nom lui répond.
The composition of a function with itself 2016-07-17
Mel pose la question :
If f(1 + 3x) = 1 * x, solve f(f(x))
Penny Nom lui répond.
If x+y=7 and x^2+y^2=42, then xy equals? 2016-07-17
Mehzad pose la question :
If x+y=7 and x^2+y^2=42, then xy equals?
Penny Nom lui répond.
A train from Erie to New York 2016-07-14
carol pose la question :
a train leaves Erie with twice as many women as men. At York, 17 men get on and 16 women . How many men and women were originally on the train?off. There are now the same number of men as women
Penny Nom lui répond.
An equation involving pi 2016-06-26
Diaz pose la question :
How would you solve :

( pie*X)/ 4 = -pie/2

I have no idea.what to do!

Penny Nom lui répond.
One million is six percent of what number? 2016-04-26
Colleen pose la question :
One million is six percent of what number?
Thanks!

Penny Nom lui répond.
A square of side length 4x-3 units 2016-04-20
Bryan pose la question :
Find an expression that represents the area of a square with side length 4x-3
Penny Nom lui répond.
Conversion of an equation 2016-04-11
Marie pose la question :
How to you convert the equation of a line from x-intercept form (y=(x-x1)(x-x2)) to general form (y=ax^2+bx+c) if it involves square roots?

For example:
Convert this equation to general form: y=(x+the square root of 5)^2

Thanks for the help!

Penny Nom lui répond.
When does sqrt(x^2+y^2)=x+y? 2016-03-30
Margret pose la question :
when does sqrt(x^2+y^2)=x+y
Penny Nom lui répond.
The perimeter of a rectangle 2016-03-17
Linda pose la question :
Noel correctly adds the length of three sides of a rectangle and gets 88 cm her brother Ryan correctly adds the lengths of three sides of the same rectangle and gets 80cm. What is the number of cm in the perimeter of the rectangle
Penny Nom lui répond.
A word problem 2016-03-10
Sam pose la question :
Jo is 10 cm taller than Ruth. Pam is 16cm taller than Ruth .Rod is 8cm taller than Pam. How much taller than Jo is Rod?
Penny Nom lui répond.
The area of a rectangle 2016-03-03
Lucas pose la question :
The area of a rectangle is given by A=x2+18x+72
-use factoring to find an expression for the dimensions of the rectangle.
-if the area of the rectangle is 7 square feet, what are the possible values of x?
-what are the dimensions of a rectangle?

Penny Nom lui répond.
Shooting a ball at a target 2016-02-16
Thys pose la question :
Hi
I have a problem with the formula that i use .(for programming)
I have looked all over the web to find a solution but no luck.
I have a cannon that shoots a ball at a target
I use this formula to calculate what my initial velocity must be to hit the target at a angle of 30 degrees and a distance of 15m (the cannon and target position is known) It works perfectly if both is at same height but if one is higher or lower it miss.

In an example I am working with the range is 30m, the angle is 45 degrees and the target is 10m higher than my position.
Please help
Formula = V0 = √RG / Sin(2α)

Harley Weston lui répond.
Two equations in two unknowns 2016-02-13
Anumba pose la question :
4x + 2y = 4
7x - y = -11

Penny Nom lui répond.
Todd is 3 years older than his brother Jack 2016-02-13
Victoria pose la question :
Todd is 3 years older than his brother Jack. If Jack is x years old and Todd is y years old, write a rule that relates their ages over time. When Jack is 28 years old, how old will Todd be?
Penny Nom lui répond.
A 2 digit number 2016-02-08
Lloyd pose la question :
The sum of digits of a certain 2 digit number is 7. Reversing its digits increases the number by 9. Find the number
Penny Nom lui répond.
The equation of a vertical line 2016-02-07
Kagiso pose la question :
The equation for a vertical line that goes through the point (7; -3) is?
Penny Nom lui répond.
38 is what percent of 400? 2016-02-07
chris pose la question :
38 is what percent of 400?
Penny Nom lui répond.
When will Scott and Jill have earned the same amount? 2016-02-04
kalia pose la question :
Scott starts with $10 and earns $5 and hour. Jill starts with $40 and earns $3 and hour. when will the two have the same amount of money in the same hours?
Penny Nom lui répond.
Solve 1/3 ( x-5 ) + 4 =1/6 ( 2 - 3 x ) +1 for x 2016-01-15
edwin pose la question :
1/3 ( x-5 ) + 4 =1/6 ( 2 - 3 x ) +1
Penny Nom lui répond.
A rectangular enclosure 2016-01-15
Amber pose la question :
A rancher wants to use 300ft of fencing to enclose a rectangular area of 4400 square feet. What dimensions should the rectangle be?
Penny Nom lui répond.
A triangular shaped garden 2016-01-13
Demetrie pose la question :
Dwayne's garden is triangle-shaped with two equal sides and a third side that is 4 ft more than the length of an equal side. If the perimeter is 49 ft, how long is the longest side?
Penny Nom lui répond.
Four consecutive integers 2016-01-05
sherica pose la question :
my teacher gave us an assignment and it says here that; THERE ARE FOUR CONSECUTIVE INTEGERS.IF THE SMALLEST ONE IS x ,FIND THE SUM OF THE FOUR INTEGERS. that is the question ...thanks hope that u can answer it
Penny Nom lui répond.
Proof that an erroneous algebraic statement is false 2015-12-14
Berteanu pose la question :
I need help with this proposition:
"It exists x a real number that for every y real number 5*x-2*y*y=1
This is false.
Let x be from R.
And I need an y real number that 5*x-2*y*y!=1
Please,could you help me?

Penny Nom lui répond.
I was wondering what xy means. 2015-09-30
Eric pose la question :
I was wondering what xy means. My two things I think it means are the two digits of x and y or x times y. thanks for your time, Eric
Penny Nom lui répond.
The length of a rectangle 2015-09-26
Tris pose la question :
Hi,
I'm trying to figure out the length of a rectangle but i forgot how. So, the width is 5cm and the perimeter is 34cm.

Penny Nom lui répond.
The weight of a pumpkin 2015-09-01
Lisa pose la question :
A pumpkins weighs 10 pounds plus half of 10 pounds plus half it's own weight, what does the pumpkin weigh?
Penny Nom lui répond.
The diameter and circumference of a circle 2015-09-01
Tracey pose la question :
Hello,
I own a custom workroom, I am figuring out fabric quantities or an estimate. When at the job site, I forgot to measure the diameter of the semi circle shape that I have to make a cushion for!!!
If the circumference of the semi circle is 165" what would the diameter be, maybe half this measurement????

I appreciate any help...I basically need the width from left to right to see if I can fit the cushion on one width of fabric that is 52" wide!

Penny Nom lui répond.
Manipulating an equation 2015-06-05
Leigh pose la question :
Hi, I'm having trouble trying to find out how the equation y=mx+b for b comes up with the answer b=y-mx. Could you please assist me with this
Penny Nom lui répond.
A two digit number 2015-06-05
Madison pose la question :
Trini took some photos. The number of photos she took is a two digit number. The sum of the digits is 11. The tens digit is 3 more than the ones digit. How many photos did Trini take?
Penny Nom lui répond.
The perimeter of a rectangle 2015-05-28
Imran pose la question :
The length of a rectangle is x+3 centimetres.
The width of the rectangle is x-1 centimetres.

Find an expression in terms of x for the perimeter of the rectangle.
The perimeter of a rectangle The perimeter of a rectangle
Give your expressions in it's simplest form.
The perimeter of a rectangle The perimeter of a rectangle
Thank You.

Penny Nom lui répond.
A word problem 2015-05-08
JAMES pose la question :
A businessman bought a number of similar articles for a total of sh. 6000. Three of the articles turned out to be defective with no resale value. He sold the remaining articles at 12.5% each above the cost price making a total profit of sh 480. How many articles had he bought?
Penny Nom lui répond.
Expand and Simplify (3x+5)(5x-9) 2015-04-23
chloe pose la question :
Expand and Simplify (3x+5)(5x-9)
Penny Nom lui répond.
The area of a circle given the circumference 2015-04-12
F pose la question :
How do you find the area of a circumference of 6?
Thanks.

Penny Nom lui répond.
Stopping distance 2015-02-11
Audrey pose la question :
A Harley Davidson motor cycle weighing 650 lbs with a rider weighing 175 bs was going 40 miles per hour. He had to make a sudden stop . Slammed on brakes. How long a distance for him to stop?
Penny Nom lui répond.
2x^2-2x+1=4x+1 2015-02-06
Caitlyn pose la question :
2x^2-2x+1=4x+1
Penny Nom lui répond.
Russell is 6 years older than Samantha 2015-01-26
Kelli pose la question :
Russell is 6 years older than Samantha. In 4 years the sum of their ages will be 78. How old is Russell now?
Penny Nom lui répond.
h+h+h = -9 2015-01-12
juanita pose la question :
How to solve h+h+h = -9
Penny Nom lui répond.
Two quadratic equations 2014-11-20
rajesh pose la question :
Sir,
I would like to discuss on question-
-Find the value of variable X and Y, equations are
X2+Y2+2XY=25
X2+Y2-2XY=1

Sir, my point is equation looks not so easy.My opinion is there many (more than 4)value possible for both X and Y.
Kindly help me.
Waiting for your response.
regards,
rajesh

Penny Nom lui répond.
(x-3)^2-(x+3)^2 2014-11-13
Bernice pose la question :
(x-3)^2-(x+3)^2
Penny Nom lui répond.
1/6k=-11 2014-11-13
Marty pose la question :
Using the balance method, what is the answer to 1/6k=-11, trying to find what k equals. Thanks
Penny Nom lui répond.
How does pir^2 = 1/4pid^2? 2014-10-14
al pose la question :
Hi I cant work out the algebra. How does pir^2 = 1/4pid^2 Thanx
Penny Nom lui répond.
15 - (5-x)/ x = 30 2014-10-13
AMANDA pose la question :
15 - (5-x)/ x = 30

I thought you had to multiply both sides by x in order to remove the fraction?

15x - 5x - x2 = 30x

then combine 10x - x2 = 30x

-x2 =20x

then take the sqrt of each side...

what am I doing wrong??

Penny Nom lui répond.
Pre algebra 2014-10-12
mohamed pose la question :
i want to know the meaning of pre algebra
Penny Nom lui répond.
Sum of 22, product of 125 2014-07-03
marj pose la question :
find two real numbers whose sum is 22 and whose product is 125.
Paul Betts, Robert Dawson and Penny Nom lui répond.
If x+y+z=1 then x^2 + y^2 + z^2 = ? 2014-04-30
Nitin pose la question :
If x+y+z=1 then x^2 +y^2+z^2 = ? ?
Robert Dawson lui répond.
The cost before the sales tax 2014-04-13
Juanda pose la question :
Hello,

I know the customer cost with tax and I know the sales tax.
How do I find out the customer cost prior to the added sales tax?

Thank you

Penny Nom lui répond.
Manipulating an equation 2014-04-12
Paul pose la question :
S=4wl+2wh and solve for h
Penny Nom lui répond.
Evaluate x-(3x+5) if x=-2 2014-04-03
Destiny pose la question :
I wanted to know the value of x-(3x+5) if x=-2
Penny Nom lui répond.
Ms. Werenich's nickels, dimes and quarters 2014-03-19
London pose la question :
Ms. Werenich has twice as many dimes as nickels and 4 more quarters than nickels. If she has $4.50, how many of each coin does she have? What would the let statements be of this problem and can you solve it?
Penny Nom lui répond.
Find two numbers with a sum of -8 and a difference of 4 2014-03-19
Elisabeth pose la question :
Find two numbers with a sum of -8 and a difference of 4. Let x be the greater number and y be the lesser number.
Penny Nom lui répond.
A word problem 2014-03-09
Joanne pose la question :
Ashley weighs 5kgs more than Joyce. Their total weight is 41 kgs. What is the weight of Ashley?
Penny Nom lui répond.
A word problem 2014-02-23
Anh pose la question :
The Texas State Legislature is comprised of state senators and state representatives. The sum of the number of senators and representatives is 181. There are 119 more representatives than senators. How many senators and how many representatives make up the Texas Legislature?
Penny Nom lui répond.
x^3+(1/x^3)=18√3 2014-02-23
Asiv pose la question :
if x^3+(1/x^3)=18√3; then what is the value of x?
Penny Nom lui répond.
A fountain surrounded by a walk 2014-02-18
Maddie pose la question :
A square Water Fountain is Surrounded by a walk 2 yards wide. If the Area of the Fountain is 2/3 of the total area of the Fountain and the Walk. What are the Outside Dimensions of the Walk
Penny Nom lui répond.
The graph of y=2x+4 2014-02-18
tyler pose la question :
y=2x+4 graph
Penny Nom lui répond.
Paul is making banana bread 2014-02-17
John pose la question :
Paul is making banana bread. The number of cups of bananas he uses is proportional to the number of loaves of bread. Paul uses 11 1/4 cups of bananas to make 5 loaves of bread. Which equation represents the relationship between c, the number of cups of bananas, and b, the number of loaves of bread?
A) C=4/9 b
B) C=2b
C) C= 2 1/4 b
D) C=5b

Penny Nom lui répond.
The growth of a tree 2014-02-16
Emily pose la question :
If a tree is 10 ft tall after 2 years and 25 ft tall after 5 yrs , find the rate of change of growth Of the tree if y is the height in ft and x is the number of years.
Penny Nom lui répond.
Rolls of window film 2014-02-14
Travis pose la question :
This question is probably close to the same question as "roll of paper"

We have Rolls of Window Film that we are trying to figure out an equation for a spreadsheet that we can use to "inventory" our window film.

We use a caliper tool to measure the thickness of the roll in millimeters.

the core thickness = 1.90mm
Full Roll thickness(including core) = 9.08mm to 9.12mm
Film thickness = 0.06

Full Roll of Film is supposed to average 1200" of film

What equation could we use to get the approximate inches left remaining on the roll if we measured the roll including the core with the Caliper tool in Millimeters?

Harley Weston lui répond.
The dimensions of a room 2014-02-01
jenna pose la question :
The length of a rectangular room is 2m more than the width. Find the dimensions if the perimeter of the room is 34m
Penny Nom lui répond.
Kate, Tess and Nina 2014-01-23
Sam pose la question :
Kate is 16 yrs. younger then Tess. Nina is 8 yrs.older then Kate. The sum of their ages is 189. How old is each?
Penny Nom lui répond.
Reducing the area of a parking lot 2014-01-19
Robin pose la question :
The school is reducing the area of its 20yd by 50yd parking lot by removing a strip at one end of the parking lot and another strip of the same width from one side. The new area of the parking lot is 504 said yes. Find the width of the removed strip
Penny Nom lui répond.
$9.50 in coins 2014-01-15
dana pose la question :
you have $9.50 in coins. it has twice as many nickels as quarters and three times as many dimes as nickels. how many of each coin do you have?
Penny Nom lui répond.
Five cubes 2014-01-15
Bob pose la question :
Rick has five cubes. When he arranges them from smallest to largest, the difference between the heights of any two neighbouring cubes is 2 cm. The largest cube is as high as a tower built from the two smallest cubes. How high is a tower built from all five cubes?
Penny Nom lui répond.
Is this operation associative? 2014-01-14
patrick pose la question :
Associative test: Can you explain the following to me?

Is the following operation associative?: x*y=x+y+1
1) x*(y*z)=x*(y+z+1)=x+(y+z+1)+1=x+y+z+2
2) (x*y)*z=(x+y+1)*z=(x+y+1)+z+1=x+y+z+2

The answer is yes as 1) = 2)

My specific questions are:
1) How x*(y*z)=x*(y+z+1)=x+(y+z+1)+1 ?
2) How (x+y+1)*z=(x+y+1)+z+1?

Thank you!!

Penny Nom lui répond.
4x^3-7x^2-2x 2014-01-10
Alvi pose la question :
4x^3-7x^2-2x
Penny Nom lui répond.
conical lamp stand/staved wood 2013-12-07
Henry pose la question :
need to make lamp stand that is wooden staved; need it to be 25 inches at bottom and 10 inches at top; need to know angles for staves to be cut; the lamp stand will be rounded on a lathe and will be 40 inches tall John Lucas built one and it is pictured on his web page. thank you for any help/direction; I checked out the answered for cone shaped objects on your page but didn't find what I could use. thanks again. Henry--woodturner, parent teacher student . . . . .
Harley Weston lui répond.
f(x)= a+b*lnx 2013-12-04
Kevin pose la question :
How do I find the curve, algebraically on paper, for f(x)= a+b*lnx with data points (6,1303) (9,1639). I can do it with LnReg on a calculator but I want to know how to get the same results or close to the same results by working it out on paper. When I run it through the LnReg on the calculator I get, f(x)=181.792+828.678 Ln x. How did it achieve this solution?
Penny Nom lui répond.
Factor 2013-12-01
Rosa pose la question :
How do you factor 9x^2 - 12y^2?
Penny Nom lui répond.
Problem solving 2013-11-26
Moira pose la question :
Amy has Ł5 more than Ben. Ben has twice as much as Chris. In total they have Ł20 how much do they each have
Penny Nom lui répond.
A concrete walk around a pool 2013-09-18
poornima pose la question :
circular Swimming pool is surrounded by a concrete walk 4 feet wide, if the area of the walk is 11/25 of the area of the pool, then the radius of the pool in feet is
Penny Nom lui répond.
A word problem 2013-09-05
Thomas pose la question :
I'm trying to help my 9th grade child with their homework. The problem is the Length of a rectangle is twice as long as it is wide. The perimeter is 68m. Find It's length and width
Penny Nom lui répond.
An algebraic equation 2013-08-28
walter pose la question :
i'm a parent helping my daughter can you do a step by step on this equation been out of school for years thanks (4w-28)+(11w+13)=180 thanks
Penny Nom lui répond.
GST and PST 2013-07-22
Bev pose la question :
Total sales revenues are 116391.38 this amount includes 5% GST and 80% of this amount includes a 7% provincial tax. The other 20% is PST exempt. GST is included in all. How do I figure the PST I owe?
Penny Nom lui répond.
Simultaneous equations 2013-07-10
Warren pose la question :
solve this simultaneous equation:
xy=4
2x+3y=14

Penny Nom lui répond.
{(1+x)^1/3-1/3X(1+x)^-2/3}/(1+x)^2/3 2013-06-17
STEPHEN pose la question :
{(1+x)^1/3-1/3X(1+x)^-2/3}/(1+x)^2/3
Penny Nom lui répond.
A silver figurine 2013-05-03
Renee pose la question :
I have a silver figurine, the density of silver is 10.5g/cm3. if the figurine weighed 149 g. to determine the volume, he dropped it into a cylindrical glas of water. the diameter of the glass is 6 cm and the figurine was pure silver, by how much should the water level in the glass rise?
Penny Nom lui répond.
A word problem 2013-05-03
Shaneaya pose la question :
Keikio spent the day bird watching and counted 34 more birds in the morning than in the afternoon. If she counted a total of 76 birds, how many birds did she count in the afternoon?
Penny Nom lui répond.
How do i reverse this formula? 2013-04-20
MK pose la question :
I have 22,000,000 worth of gold and wants to want to resell the gold back with a profit. Each transaction of gold will have a transaction fee of 15%, so if i resell the gold back at 22,000,000, I will only get back 18,700,000 after 15% transaction cut. The current formula is X-15%X = Y where X = 22,000,000 and Y = 18,700,000 Will u be able to come up with a new formula if we don't know the value of X but we know the value of Y
Something like this X-15%X = 22,000,000. How do i reverse this formula to find the value of X
Thanks

Penny Nom lui répond.
An algebraic exercise 2013-03-18
autumn pose la question :
given: f(x)=x/(x^2+2) determine: [f(x-h)-f(x)]/h
Penny Nom lui répond.
Driving a rental car 2013-03-13
teresa pose la question :
Driving a rental car x miles cost y= 0.25x + 25 dollars.

(a) How much would it cost to rent the car but not drive it?
(b) How much does it cost to drive the car 1 additional mile?
(c) What is the y-intercept of y= 0.25x + 25? What does it represent?
(d) What is the slope of y= 0.25x + 25? What does it represent?

Penny Nom lui répond.
What is the subtotal & GST? 2013-03-04
REBECCA pose la question :
Hi, I have a total of $300. What is the subtotal & GST? How do I work backwards?
Penny Nom lui répond.
Swimming upstream and downstream 2013-02-15
Kimberly pose la question :
a beaver swims down to its lodge 4 times faster than it swims upstream. how many times faster is its speed in still water than the speed of the stream?
Penny Nom lui répond.
Chocolate bars and puzzles 2013-02-15
sandy pose la question :
Alan bought a box of puzzle and two bar of chocolate for $28.
Jan bought 3 boxes of puzzle and a bar of chocolate similar to Alan for $69.
a) Find the cost of a box of puzzle
b) Find the cost of a bar of chocolate

Penny Nom lui répond.
A word problem involving toys 2013-02-14
sandy pose la question :
Each boy gets 5 toys.Each girl gets 3 toys.There are 150 pupils.
The boys had 74 more toys than girls.
How many boys?
How many girls?

Penny Nom lui répond.
A cubical shipping container 2013-02-12
Chantel pose la question :
The length, width and height of a cubical shipping container are all decreased by 1.0 ft, thereby decreasing the volume of the cube by 37 ft3(feet-cubed) What was the volume of the original container? (recall: volume of cube with a side length x=x3) Define the variable, write a quadratic equation and solve by factoring.
Penny Nom lui répond.
Brian is x years old 2013-02-06
Sabrina pose la question :
Brian is x years old.
Peter is 4 years older than Brian.
Amy is 2 years younger than Brian.
The total of their ages is 26 years.
Work out the value of x.

Penny Nom lui répond.
7x-1/4-1/3[2x -1-x/2]=19/3 2013-02-03
M pose la question :
7x-1/4-1/3[2x -1-x/2]=19/3
Penny Nom lui répond.
The area of a rectangle 2013-01-29
Bali pose la question :
if the length of the rectangular field is decreased by 5m, its area is decreased by 70 sqm. if the width is increased by 6m, the area is increased by 180 sqm. determine the length and width of the rectangular field?
Penny Nom lui répond.
A 12 acre parcel of land 2012-12-28
John pose la question :
What are the dimensions of a 12-acre parcel if it is 3 square acres deep and 4 square acres wide?
Penny Nom lui répond.
Increasing the size of a gift box 2012-12-27
Tehmas pose la question :
The dimensions of a gift box are consective positive integers such that the height is the lowest integer and the length is the greatest integer. If the height is increased by 1cm, the width increased by 2 cm, and the length increased by 3 cm, then a larger box is constructed and the volume is increased by 456 cm^3. Determine the dimensions of each box.
Harley Weston lui répond.
A parabolic bridge 2012-12-09
Elizabeth pose la question :
1) The figure below shows a bridge across a river. The arch of the bridge is a parabola and the six vertical cables that help support the road are equally spaced at 4-m intervals. Figure B shows the parabolic arch in an x-y coordinate system, with the left-end of the arch at the origin. As indicated in Figure B, the length of the leftmost cable is 3.072 m.

I'm suppose to find the (x-h)^2=-4a(y-k) equation for this word problem and I really do not know where to begin.

Afterwards, I need to find the lengths of the other cables and the maximum height of the arch of the road as well which I am very confused about

Penny Nom lui répond.
An arrow is shot straight up in the air 2012-12-06
heather pose la question :
The skywalk is a glass bottomed platform that hangs over the edge of the Grand Canyon and is suspended 4000 feet above the floor of the canyon. If a tourist shot an arrow straight up in the air from the observation platform, the arrow's height could be modeled by H(t) =-16^2 + 240 + 4000 where H(t) is the height of the arrow above the canyon floor in feet t seconds after being shot, t>0.
(a) Find H(5) and explain its meaning

Penny Nom lui répond.
Factor (6a^2-5a+1)(8a^2-6a+1)(12a^2-7a+1) 2012-11-16
bailey pose la question :
Factorise f(a)=(6a^2-5a+1)(8a^2-6a+1)(12a^2-7a+1) thus find [f(a)]^1/2
Penny Nom lui répond.
The sum of a number p and twenty-one 2012-10-30
mayra pose la question :
the sum of a number p and twenty-one
Penny Nom lui répond.
Introductory algebra 2012-10-30
kevon pose la question :
if x = 7 is used in the expression 2x + 5 what is the output
Penny Nom lui répond.
Forming an algebraic expression 2012-10-27
ashley pose la question :
A sidewalk has a constant width W and comprises several short sections having lengths 12, 14,and 10 feet. How do I find the simplified expression that gives the number of square feet of sidewalk?
Penny Nom lui répond.
A label to cover a plastic cup 2012-10-23
Kevin pose la question :
I'm trying to make a label to cover the entire outer area or a plastic cup. I know there must be a way to figure out the dimensions needed, but I can't seem to figure it out. The circumference of the bottom of the cup is 21.4cm and the circumference at the top of the cup is 29.8cm. The cup is 14.5cm tall. What should the height of the arc from the plane connecting the two ends of the 21.4cm arc. I attached a diagram where x is the value I'm looking for. I'm guessing there is some simple relationship between the length of a line and the arc needed to turn that line into a perfect circle, but I don't know what it is. Can you figure this out and share it with me? Thanks.

-Kevin

Penny Nom lui répond.
Solving for a/b 2012-10-21
Jenny pose la question :
If a + 3b is equal to 175% of 6b, what is the value of a/b?
Penny Nom lui répond.
Passing out graph paper 2012-10-18
Andrea pose la question :
mr karnowski has a stack of 125 sheets of graph paper.He is passing out g sheets to each of his students. What is the expression for the number of sheets he will pass out to the first 5 students?
Penny Nom lui répond.
A tank with an inner walled compartment 2012-10-12
don pose la question :
I have a tank 20 feet diameter, 19' 8" tall with an inner walled compartment that has a 7' 6" radius arc with in the tank. I need to figure out the volume of the inner area and the volume of the larger area.
Harley Weston lui répond.
A problem that yields a linear equation 2012-10-07
Eshraj pose la question :
one fourth of a whole number is three more than one fifth of the next whole number.find the whole number
Penny Nom lui répond.
Find an algebraic expression 2012-10-03
Karen pose la question :

Question from Karen, a parent:

Find an algebraic expression relating the input and output.

input output
   
3 1
9 3
15 5
21 7
27 9

Penny Nom lui répond.
Solve 8t-r=12t for t 2012-09-29
Monejah pose la question :
I need help solving 8t-r=12t for t
Penny Nom lui répond.
The dimensions of a rectangle 2012-09-12
Becky pose la question :
A rectangle has an area of 48 square inches and perimeter of 32 inches. Find the dimensions of the rectangle.
Penny Nom lui répond.
(2y+1)/3=(1y-1)/2 2012-09-06
jenna pose la question :
(2y+1)/3=(1y-1)/2
Penny Nom lui répond.
The area of a rectangle 2012-08-31
mario pose la question :
The area of a triangle when on side is x and the other is x+6
Harley Weston lui répond.
Making a wind sock 2012-08-28
John pose la question :
I am trying to build a wind sock and need to be able to lay the shape out on cloth. I need the wind sock front opening (diameter) to be 3 1/2" and the rear opening diameter to be 1". The windsock needs to be 9 1/2" long. I tried using the example of the person trying to make a crayfish trap but got confused and could not figure out my numbers. Any help would be greatly appreciated.

Thanks

John

Penny Nom lui répond.
A tapestry rod on a curved wall 2012-08-14
Marlyn pose la question :
I have a curved wall with a radius of 6'. I am trying to have a 36" rod made to hang a tapestry and need to figure out the degree measure of the arc. Can you help me please?
Penny Nom lui répond.
The difference between two numbers is 7. 2012-08-09
May pose la question :
The difference between two numbers is 7. When the two numbers are multiplied the answer is 60. How do I work out the two numbers,I tried solving for one unknown and substitution and can not do it. Pleas show me how to do this.
Penny Nom lui répond.
A 10 inch circle using 2x4s 2012-05-19
Ralph pose la question :
I want to form a 10" circle with 4"high pieces of 2 x4's. If each 2x4 piece sit next to each other,What degree would I have to cut each side of the 2x4's, and how many would I need to form a 10 inch circle. I know there is a formula for this out there somewhere.
Harley Weston lui répond.
Measuring the liquid in a horizontal tank 2012-02-28
Philip pose la question :
I have a steel gas tank that is 3' dia X 5' length. The total volume is 1000 litres. But how much is left when I use a stick and measure 6" from the bottom or 12" or 24" ?? Is there a formula to use for this task?

Thanks.

Harley Weston lui répond.
Figures with dots 2012-02-15
A pose la question :
Okay so my daughter came home and had this question for homework from her teacher. I have no idea what it means HELP!!
The question shows a figure that is a square. It has 5 dots on the top, bottom and on the sides looks similar to this:
. . . . .
.       .
.       .
.       .
. . . . .
they want to know 3 more ways to show the number of dots in the figure. They have already shown one with just counting them and the other one that they showed was circling the four corner dots and then taking the dots in between with a number sentence set up like this: 4+4*(5-2) = 4+4*3= 16. They also besides giving 3 ways want us to write a number sentence and an algebraic sentence to show the number of dots in the figure with "n" sides. Please help! So confusing ! I don't know if my square turned out or not but it should be 5 across the top and bottom and on the sides and no dots in teh middle it is just the outside.

Penny Nom lui répond.
Building a tipi 2012-01-29
Lacy pose la question :
Hi there! We are building a tipi for our children. We want to build a large one about 15ft tall with a base of about 15 feet diameter. I am trying to figure out how much canvas we need to accomplish this. I graduated about 20 years ago and am struggling. Please help if you can.
Penny Nom lui répond.
-8(3x+4)+6x=4(x-8 )+4x 2012-01-18
bianca pose la question :
-8(3x+4)+6x=4(x-8 )+4x
Penny Nom lui répond.
What is the height of the triangle? 2012-01-12
Hailey pose la question :
The area of a triangle is 77ft2. if the base is 11ft. how tall is the height?
Penny Nom lui répond.
Sum and difference of squares 2011-12-31
Anne pose la question :
Se x e y săo números reais distintos, entăo:
a) (x^2 + y^2) / (x - y) = x + y
b) (x^2 + y^2) / (x - y) = x - y
c) (x^2 - y^2) / (x - y) = x + y
d) (x^2 - y^2) / (x - y) = x - y
e) Nenhuma das alternativas anteriores é verdadeira.

Harley Weston lui répond.
i+i^2+i^3+i^4...+i^102 2011-12-13
megan pose la question :
how do you solve i+i^2+i^3+i^4...+i^102
Robert Dawson lui répond.
factor 6x2-19x+3 2011-12-10
pedro pose la question :
factor 6x2-19x+3
Penny Nom lui répond.
What does 2xy mean? 2011-12-07
dana pose la question :
I don't know what is 2xy what does that mean? is it 2x+2y or 2x times y Please help! thank you for your time!! :)
Penny Nom lui répond.
The dimensions of a rectangle 2011-11-11
Ivan pose la question :
The length of a rectangle is 31 centimeters less than five times its width. Its area is 72 sq centimeters. Find the dimensions of the rectangle.
Penny Nom lui répond.
3 fish 2011-10-27
Ann pose la question :
You have 3 fish weighing a total of 21 lbs. The largest fish weighs twice as much as the second fish and the third fish weighs half the amount of the second fish. So how much does the third fish weigh?
Penny Nom lui répond.
Expanding the size of a table 2011-10-16
Ericka pose la question :
You are working as a carpenter in an industrial Shop. A customer came to you and inquired about the size of the table which would be fitted in her room. She informed you that she had already a 1.5 x 1m table in her room but she wanted to maximize the space by adding the same amount to is length and width. She is planning to occupy a 3 square meter place on her room for her to work comfortably. She is requesting you a written recommendation before she asked to make a table. What amount should be added to both sides to maximize a 3 square meter area?
Penny Nom lui répond.
A rectangular wall 2011-09-12
Jimi pose la question :
The area of a rectangular wall of a barn is 110 square feet. It's length is 12 feet longer than twice its width. Find the length and width of the wall of the barn.
Penny Nom lui répond.
A beginning algebra question 2011-09-10
Tobby pose la question :
A=1/2 solve for h.area of a rectangle with b and h
Penny Nom lui répond.
A stained glass lamp 2011-07-25
Guy pose la question :
Like Kay, I also work in stained glass, but in 3-dimensions. I am frequently asked to replicate lamp shades in stained glass where the diameter of the top is different (narrower) from the diameter of the bottom (which is wider). Some people want 5, 6, 7, 8, 10, 12, 16, ,,, n-sided shades. Is there a formula I can use to determine the width of the sides using the angle, if I remember correctly, I think it's called theta. In other words, is there a formula where I can plug in the angle which describes the arc of the circle. For instance, if someone asks for a 7 sided shade, plugging in 51.43 (360/7). I could then use that to determine the width at the top and bottom rings to create the appropriate trapezoids. I've visited a few sites so the formula looks like its a function of sin & cos but they are presented like proofs for teaching. Your site appears to want to actually answer questions without making the inquirer feel stupid.
Harley Weston lui répond.
The height of a fluid in a horizontal tank 2011-07-24
jason pose la question :
Same set up as many others, cylindrical tank on its side, but I am interested in defining the change in volume and/or fluid level as a function of time at a constant volumetric outflow. I plan on hooking a pump to the tank so "gpms' will be constant. I have a couple different sized tanks and pumps so I want a general equation. Thanks for your help.
Harley Weston lui répond.
The length of a belt around three pulleys 2011-05-18
Grant pose la question :
I need to calculate the belt length around these pulleys, please can you help or refer me?

Known variables
D - Large Pulley Diameter
d - Small Pulley Diameter
c - Center Distance between D and d
T - Tension Pulley Diameter
x - Horizontal Distance between T and d' Centers
y - Vertical Distance between T and d's Centers
I need to calculate the belt length around these pulleys.


Kind Regards,
Grant

Harley Weston lui répond.
What was his salary before the raise? 2011-05-16
Annette pose la question :
Need to show all my work and round to the nearest dollar. If James received a 9% raise and is now making $102.00 per year, what was his salary before the raise?
Penny Nom lui répond.
The dimensions of a rectangle 2011-05-08
yolanda pose la question :
If the length of a rectangle is 3ft less than twice its width and the area of the rectangle is 54ft^2,what are the dimensions of the rectangle?
Penny Nom lui répond.
(4x-5)(3x+2)=0 2011-05-04
Corina pose la question :
solve: (4x-5)(3x+2)=0
Penny Nom lui répond.
How many students are 25 and under? 2011-05-01
ella pose la question :
use the five steps of problem solving to answer the following question Enrollment at a local university is 8,500. There are one third as many students over the age of25. there are 25 and under. how many students are 25 and under and how many are 25 and older(p 5)
Penny Nom lui répond.
The area of a rectangle 2011-04-30
Hayley pose la question :
A rectangles width is exactly twice its length. The area of the rectangle is 450 square feet. What are the length and width of the rectangle?
Penny Nom lui répond.
Deciding where to bowl 2011-04-29
ella pose la question :
the bowling alley on wedge street charges $5.50 for shoe rentals plus $2.50 per game. lawerence bowing alley charges $4.00 shoe rentals and $3.00 per game . how many games should they bowl to make wedge street cheaper than lawerence street
Penny Nom lui répond.
x/6 + 4/5 = x/9 2011-04-10
Khadija pose la question :
x/6 + 4/5 = x/9
Penny Nom lui répond.
The perimeter of a rectangle 2011-04-04
aspen pose la question :
the perimeter of a rectangle is twice the sum of its length and its width. the perimeter is 40 meters and its length is 2 meters more then twice its width. what is the length?
Penny Nom lui répond.
[(90+36-4) ÷ 2] x 15 = 2011-03-30
ken pose la question :
[(90+36-4) ÷ 2] x 15 =
Penny Nom lui répond.
6(M-1/9)=55/12 2011-03-15
Colleen pose la question :
6(M-1/9)=55/12
Penny Nom lui répond.
Three consecutive odd numbers 2011-03-11
George pose la question :
Write an equation three consecutive odd numbers whose sum is 75
Penny Nom lui répond.
Calibrating a conical tank 2011-02-05
Bill pose la question :
Hi, I have a round tank with tapered sides where I know the diameter at the top and bottom. Is there a formula I can use to calculate the volume by measuring from the bottom up the side (at the angle of the side) to any given point? Thanks, Bill
Stephen La Rocque and Penny Nom lui répond.
A fence around a water tank 2011-02-01
Heath pose la question :
I am building a fence around a water tank. the fence is to be in the shape of a normal octagon. The tank has a circumference of 57 ' 6''. I would like the fence to be 3 ft from the tank at the skinny point . How would I calculate(for the simple guy) where to set each of my 4x4 posts at the 8 corners. Any help would be greatly appreciated.
Harley Weston lui répond.
The area of a rectangle 2011-01-31
T.S. pose la question :
for which value of w does the rectangle below have an area of 864 square units if sides are width=w+15 and length=w-15
Penny Nom lui répond.
A rectangle 2011-01-16
meg pose la question :
if a rectangle has a length that is 3cm less than 4 times its width and its perimeter is 19cm, what are the dimension?
Penny Nom lui répond.
2x = 2+2x 2011-01-15
james pose la question :
2x=2+2x can you help me find what x epauls?
Penny Nom lui répond.
Matt is thinking of two numbers 2011-01-14
mary pose la question :
Matt is thinking of two numbers. One number is 9 more than the other number. The sum of the numbers is 45. What are the numbers?
Penny Nom lui répond.
An algebra problem with fractions 2010-10-16
Morgan pose la question :
Hi my math teacher has given us this question for our grade nine math class and I always get confused about multiple x algebra, could you help me?

6x+4        3x+2
------   =  ------
  3               5



I have no problems until it comes to combining integers, or x's

Penny Nom lui répond.
A linear system 2010-10-15
Sandy pose la question :
HARD!! algebra (Linear Systems) question? An Airplane cruises at 120km/h in still air. One day, when the wind was blowing steady from the west, the airplane travelled west (flying into the wind) and landed at its desination after 1.5h. The airplane's return trip (flying with the wind) was only 1.0 h long. On both legs, the airplane travelled at its cruising speed. (meausred with respect to the air surrounding the airplane).

Part A
Write a System of equations that would allow you to determine the speed of the wind blowing that day and the distance travelled each way

Part B
When solving the system of equations graphically, what equations would you enter into the equation editior (to make graphs on your calculator)

Part C
Indicate what the X and the Y represent

Stephen La Rocque lui répond.
2x − 1 ( 1 − 2x) = 1 ( 2x − 2x) 2010-10-08
MC pose la question :
Solve 2x − 1 ( 1 − 2x) = 1 ( 2x − 2x) for x

I am befuddled! Thank you for any explanation you can give that show me the steps. I know the order in which I should tackle it, but am so confused regarding how to assume x. Thank you!

Penny Nom lui répond.
20% profit on the selling price 2010-09-24
ata pose la question :
My cost is 100 and I want to make 20% profit on my selling price (not 20% of the cost). So, what should be calculation formula? Let's say my cost is 493.71 and I want to make 53.28% profit on the selling price; so how to determine the selling price?
Penny Nom lui répond.
A reverse PST calculation 2010-09-23
Manning pose la question :
Hi, I'm a manufacturing contractor in Saskatoon. The way to calculate PST for us is using total contract amount x 70% then 5%. For example, contract amount of $100 x 70% x 5% = $3.5 (PST). The subtotal is using contract amount + PST. $100 + $3.50 = $103.50.

If you only know the subtotal is $103.50 including PST, how do you reverse calculation to get the contract amount?

Thank you very much for your help.

Harley Weston lui répond.
An algebraic equation with fractions 2010-09-10
leah pose la question :
If 6/x - (x-1)/2 = 4 then the LCD is 2x, right? so you get 12/2x - (x2-x)/2x = 8x/2x, right? then what do you do with the 2x when you turn it into a quadratic equation?
Penny Nom lui répond.
Algebraic Equations 2010-08-10
Justin pose la question :
the amount of money that Mika has if she has some quarters

how fast Rya runs if she runs 5 mi/h slower than Danae
please help,
thanks, justin

Robert Dawson lui répond.
A shrunken car 2010-07-31
Diana pose la question :
Car manufacturers have outdone themselves. They have discovered how to shrink a car to make parking easier. At the touch of a button, a car shrinks by 2 feet in the width and 4 feet in the length. The original car base is 24 square feet longer than that of the shrunken car. If the original cars length is twice the width, find the dimensions of both cars. Identify the unknowns carefully.
Penny Nom lui répond.
An octagon shaped bench 2010-07-09
rob pose la question :
i am trying to build a octagon shaped bench to fit inside a 69 inch round hot tub so that the tip of each point touches the edge of the circle where it will be fastened.
Stephen La Rocque lui répond.
An algebraic fraction 2010-06-28
luis pose la question :
3x-2//4-3x=12
Stephen La Rocque lui répond.
Which values of x satisfy (x-2) / (x+4) <7 2010-05-23
Rocco pose la question :
Which values of x satisfy (x-2) / (x+4) <7
Harley Weston lui répond.
(x+1)(x+2)(x+3)/(x+1)(x+2) 2010-05-19
Nazrul pose la question :
Simplify : (x+1)(x+2)(x+3)/(x+1)(x+2)
Which answer is correct:
(i) x+3
(ii) (x+2)^2(x+3)
Please help me.

Harley Weston lui répond.
A loop 2010-05-05
Amir pose la question :
what is loop theory in algebra?
Chris Fisher lui répond.
How many terms are in the simplified expression? 2010-04-29
Anu pose la question :
The expression (x+y+z)^2006 + (x-y-z)^2006 is simplified by expanding it and combining like terms.
How many terms are in the simplified expression?

I've spent hours on this. pls help!!!
Also, is answering these questions a paid job for you or is it volunteer work?
I'd like to join an ask and answer site for math, (when I grow up)
How does one go about doing that?

Robert Dawson lui répond.
The width of a picture frame 2010-04-28
Daniel pose la question :
The frame of a picture is 28 cm by 32 cm outside and is of uniform width. What is the width of the frame if 200 cm ^2 shows?
Penny Nom lui répond.
A rectangular garden 2010-04-25
Billy pose la question :
Tanisha wants to make a rectangular garden with a perimeter of 38 feet. What is the greatest area possible that tanisha can make the garden?
Penny Nom lui répond.
Algebraic fractions 2010-04-22
rory pose la question :
3x/(x˛-64)+4/(x˛-6x-16)=
Robert Dawson and Harley Weston lui répond.
The length and width of a table 2010-04-19
Linda pose la question :
The length of the top of a table is 2 feet longer than 4 times the width. The area is 72m squared. Find the dimensions of the table.
Penny Nom lui répond.
Four less than three times a number is 14 2010-04-16
David pose la question :
My daughter has two questions that we could use some help with.

First ?
Four less than three times a number is 14

Secound?
The quotient of -15 and w

Penny Nom lui répond.
A rectangle problem 2010-04-12
Charlene pose la question :
The ratio of the width to the length of a certain rectangle is equal to the ratio of its length to the difference between its length and twice its width. If the area of the rectangle is 25cm^2, then what are its dimensions? Present a non- algebraic solution?
Tyler Wood lui répond.
Coins in 3 parking meters 2010-03-27
Zena pose la question :
There are 227 coins altogether in 3 parking meters. The second meter has 37 more coins than the first meter. The third meter has twice as many coins as the second. How many coins in each meter?
Penny Nom lui répond.
y = kx 2010-03-26
harold pose la question :
if y =kx and y =4/15 and x=2/3, what is value of k
Penny Nom lui répond.
Selling lettuce 2010-03-11
Mike pose la question :
Day 1 started with 80 heads of lettuce and x were sold.
Day 2 started with two times the number of heads of lettuce that was left over. Again, only x were sold.
Day 3 started with 3 times the number of lettuce from what was left over from day 2 and all was sold.
What was the # of lettuce sold on each day?

Penny Nom lui répond.
Log[f(x)] 2010-03-08
sourabh pose la question :
What is the number of solutions of the equation 9 x 2 - 18 x + 5 = 0 for x, such that the expression log10[(x+1)(x+2)] exists?
Harley Weston lui répond.
Redwood Park and Glendale Park 2010-03-05
Shaun pose la question :
Question from Shaun, a student:

Redwood and Glendale Parks are each surrounded by 100 yards of fencing. The are of Redwood Park is 25 square yards more than the area of Glendale Park. If both parks are rectangles, what is the measurement of each rectangle?

Harley Weston lui répond.
Standard form 2010-03-05
Laura pose la question :
How do I change 3y=4x+1 into standard Ax+By=C standard form. This is my son's schoolwork. I homeschool him. I got the answer to the problem as 3y=4x+1, but it needs to be written in standard form and I know it needs to read 4x-3y=-1, but how do I get that answer into standard form. I need to know how to explain it to him. Can you show me? Thank you so much.
Penny Nom lui répond.
The dimensions of a rectangle 2010-03-03
Kirsten pose la question :
A rectangle is twice as long as it is wide. Its area is 128 square meters. What are the dimensions of the rectangle?
Tyler Wood lui répond.
An algebraic equation with fractions 2010-02-19
Ingrid pose la question :
What is the solution set of the equation x over x plus 4 = 1 over x plus 3 = 28 over x to the 2nd power - x- 12?
Penny Nom lui répond.
The center of a rectangular room 2010-02-16
Diana pose la question :
Consider a rectangular room, 15 feet wide, 30 feet long and 12 feet high. What is the exact distance from any of the 8 corners of the room and its geometric center? Can you write a generic formula for such a distance? And if we keep the same proportions on all dimensions, can you write an expression for the same distance as a function of the floor perimeter?
Penny Nom lui répond.
The dimensions of a flag 2010-02-15
dawn pose la question :
a state flag was twice as long as it was wide and had an area of 288 sq inches, what were its, dimensions
Thanks

Penny Nom lui répond.
Mixing oil 2010-02-03
Andrew pose la question :
A dealer wishes to produce 300 gallons of oil worth 40cents a quart. He has oil worth 36cents a quart and oil worth 52cents a quart. How many quarts of each should he mix?
Penny Nom lui répond.
divide the product of 'x' and '3y' by '2z' 2010-01-19
shradheya pose la question :
write all fall using variable ,number, and basic operation

1. divide the product of 'x' and '3y' by '2z'.

Penny Nom lui répond.
Setting up an algebraic equation 2010-01-18
jerry pose la question :
the 1st of 4 books has twice as many pages as the 3rd. The 2nd book has 30 pages less than the 1st. The 4th has 42 pages more than the 1st and 2nd books combined. there are 567 pages in total. How many pages are in each book.
Penny Nom lui répond.
4x +3/4 = 1/4 2009-12-12
Lynda pose la question :
4x +3/4 = 1/4

I know the answer is -1/8 but I don't know how to show the process of getting the answer

Penny Nom lui répond.
Books on a shelf 2009-10-25
Julie pose la question :
a bookshelf is 36 inches long and contains (x) books each (n) inches thick. If each book half an inch thinner, the shelf would hold six more of the same book. What is x/n
Penny Nom lui répond.
f(x + h)-f(x) 2009-09-07
Marie pose la question :
For each function defined as follows, find a.) f (x+h) b. f(x+h)-f(x) c. [f(x+h)- f(x)]/h.

Problem: f(x)= -1/ x^2.

Harley Weston lui répond.
The area of a rectangle 2009-08-21
roxanne pose la question :
the dimensions of the rectangle: 3x length and 4x width. What is the area of the rectangle in square units?
Penny Nom lui répond.
Pre-Algebra Resources 2009-07-16
M pose la question :
What is the best pre algebra book that is inexpensive and will really help me to understand pre algebra?
Janice Cotcher lui répond.
Finding the Line Joining Perpendicular Feet 2009-07-16
mukulu pose la question :
Please help I've been tryng to search in your data but i failed to get the solution Find the equation of a straight line joining the feet of the perpendiculars drawn from the point A(1,1) to the line 3x-3y-4= 0 and 3x+y-6=0.
Janice Cotcher lui répond.
The product of two consecutive integers 2009-07-13
kelly pose la question :
the product of two consecutive integers is 9 less than the square of the second integer
Penny Nom lui répond.
x^3+1/x^3=18*sqrt(3) 2009-07-08
Nazrul pose la question :
If x^3+1/x^3=18*sqrt(3) then how can I evaluate the value of x+1/x? Thank you for your help.
Robert Dawson lui répond.
Solving an Algebraeic Equation with Fractions 2009-06-04
olivia pose la question :
solve for x (3x-1)/4 + (x+3)/6 = 3
Janice Cotcher lui répond.
Solve 18(C-3)=162 for C 2009-05-29
Alicia pose la question :
18(C-3)=162

adult student returning to school after 20 years and then never had it in school. Just doesn't click yet

Penny Nom lui répond.
Winding paper after a break 2009-04-10
Olen pose la question :
Question from Olen:

I work in a paper mill and have been handed the task to search for a formula to determine how much paper needs to be added to a parent roll to make up the difference at the winder. (Ex. The spool diameter at the reel is 18.25" we measure roughly 33.5" to make two 58" rolls in the winder. If the is a paper break and the roll diameter in the winder is 30" how much do I add to a single parent roll (22" roughly) to make one 58 " and the 28" needed at the winder. I would appreciate any help to complete this task. I would like to be able to build a chart that operators can refer to based on what is needed. Thank you.

Harley Weston lui répond.
A five game average of 148 2009-04-01
Shelly pose la question :
(128 + 145 + 139 + 157 + x) divided by 5 = 148 matches the situation stated below:

A person bowled four games and scored 128, 145, 139, and 157. Find x, the score the person would need to have in the fifth game to average 148 for all five games.

How do I solve this and how am I supposed to add x like it says in the equation?

Penny Nom lui répond.
x^2/5 - 4/5 = -3/5x 2009-03-25
Lorrie pose la question :
x^2/5 - 4/5 = -3/5x
Penny Nom lui répond.
Fertilizer in a bin 2009-02-03
Todd pose la question :
Hello I am looking for a formula to figure out the fertilizer volume in a hopper bottom bin not only when it is full but part full as well. When you are filling it is heaped up in the middle to make a cone and when you are emptying the bin the cone is inverted so it would be nice to be able to quickly figure out the tonnes partly filled and when full.
Lets say the bin is 32 feet high from top of bin where you fill to the bottom where the product goes out and it is 16 feet in diameter. I know how to calculate the cylinder it is the cones on the top and bottom of the bin I have the main question on.

Harley Weston lui répond.
Calculating markup 2009-02-03
Tonya pose la question :
I'm trying to figure out the formula for the following, I have a product that I want to receive a certain profit, but with this product I also have to pay a percentage of commission to someone. I need to know how to calculate my new selling price taking into account the markup percentage, but I don't want my cut to be lowered. I have calculated the markup percentage to get my new selling price with the commission, but it lowers my cut once I pay the commission and I don't want it to do that. Thanks
Penny Nom lui répond.
Find area of the rectangle in terms of L. 2009-01-27
Arlen pose la question :
The length of a rectangle is L. The width is 8 less than the length. Find area of the rectangle in terms of L.
Penny Nom lui répond.
Solve (3x-2)/4 - 3x = 12 2009-01-26
michelle pose la question :
3x-2/4 - 3x = 12
Penny Nom lui répond.
The whole number that precedes a number w+3 2009-01-17
Morgan pose la question :
write a variable expression for "The whole number that precedes a number w+3"
Penny Nom lui répond.
An expression for q quarters and n nickles 2009-01-16
Morgan pose la question :
a variable expression for:

"The value in cents of q quarters and n nickels"

Penny Nom lui répond.
For which integers a, b, c does a - b - c = a - (b - c)? 2009-01-13
Johanna pose la question :
For which integers a, b, c does a - b - c = a - (b - c)?
Penny Nom lui répond.
Eric bought 3 sweaters and 1 pair of pants 2009-01-01
maya pose la question :
eric bought 3 sweaters and 1 pair of pants. Each sweater cost d dollars and the pants cost 20 dollars. Eric spent a total of 95 dollars. The equation below can be used to determine the cost of each sweater. what is the answer?
Penny Nom lui répond.
Solve for x 2008-12-16
Melissa pose la question :
I have a test tomorrow and I'm hoping you can help me before then. I can never seem to solve the "RESOLVE X" problems, or in french resous pour x/
They look like this. 3x+2\6=2x-5\3. I only understand NOTHING from that. Another equation is 2(x+1)=3(x+2).

Robert Dawson and Penny Nom lui répond.
Determining the Unknown Numbers 2008-12-06
jacob pose la question :
the sum of two numbers is 45 and their difference is 15. what are the two numbers?
Janice Cotcher lui répond.
An algebraic exercise with fractions and radicals 2008-11-18
Rubén pose la question :
Question from Rubén, a teacher:

I have the ecuation:

U = [yb / (ab+a^2)]^1/2 + [ya / (ab+b^2)]^1/2

I know for sure this reduces to

U = [y (1/a + 1/b)]^1/2

but I cannot find a way to get into that result!

Thanks

Rubén Osuna lui répond.
Equations with fractional powers and roots 2008-11-12
David pose la question :
Find all real solution to each equation.

x^-2/3 = 9 how do you do this if its to the power

x + 1= Square root (3x +13) can you explain how to get an solution with square root?

Penny Nom lui répond.
Algebraic equations with fractions 2008-11-07
John pose la question :
Solve each equation. Check each solution.
1/8+5x/x+2=5/2
10/2y+8 - 7y+8/y(squared)-16 = -8/2y-8

Harley Weston lui répond.
Solve the equation 2x + y = 6 for y. 2008-11-07
fatiuma pose la question :
Solve the equation 2x + y = 6 for y.
Penny Nom lui répond.
Algebraic fractions 2008-10-06
Kayla pose la question :
(x^2-9)/x times (x^3-4x)/(x^2+5x+6)
Harley Weston lui répond.
Adding fractions 2008-09-17
amanpreet pose la question :
please can you help me to simplify:

2(c-3) / 7 + 3(4c-2)/2

Penny Nom lui répond.
Two Step Equation 2008-09-17
calea pose la question :
i really dont now what two-step equation means?
Janice Cotcher lui répond.
Cows, chickens, heads and feet 2008-09-01
marina pose la question :
Iam helping my 6th grader son solve this problem. I found similar problem in the Q&A.I understood the simple answer without using an equation. I want to solve this using the equation.This is the question about chicken and cows. There are cows and chickens in the farm. There are 65 heads and 226 legs. How many chicken are there?
Harley Weston lui répond.
v-4(4-v) = -2(2v-1) 2008-08-29
c pose la question :
Please explain all the steps to solving this

v-4(4-v) = -2(2v-1)

Penny Nom lui répond.
An algebraic expression 2008-08-29
Antonio pose la question :
write a variable expression for 9 less than k
Penny Nom lui répond.
Algebra 2008-08-10
Reasat pose la question :
How to understand algebra?
Stephen La Rocque lui répond.
1/X-2 + 3/X+3 = 4/X^2+X-6 2008-08-06
Molly pose la question :
Hi, I'm beginning pre-calc this semester, and for practice over the summer, the teacher has given us a review packet with algebra 2 stuff. Well, I've forgotten most of the fraction stuff on it. Would you please help? Here's the question:

1/X-2 + 3/X+3 = 4/X^2+X-6

Penny Nom lui répond.
Solving with the Natural Log 2008-07-28
CB pose la question :
I am trying to solve lnx +3ln2 = ln 2/x. Every way I've tried when I go to plug in the solution it doesn't come out right.
Penny Nom lui répond.
Solving for Two Variables 2008-07-24
Mary pose la question :
can you help, 2/35= 1/x +1/y ; x
Janice Cotcher, Victoria West and Harley Weston lui répond.
Four Positive Integers 2008-07-20
william pose la question :
let a, b, c and n be positive integers. If a+b+c=(19)(97) and a+n=b-n=c/n, compute the value of a.
Janice Cotcher lui répond.
multiply = 3a - 3b by a+b 2008-07-15
chaleen pose la question :
multiply = 3a - 3b by a+b
Penny Nom lui répond.
x=(-14x+16)/x-8 2008-06-11
Kory pose la question :
Solve the equation.
x=(-14x+16)/x-8

Penny Nom lui répond.
Substitution into a formula 2008-06-02
beth pose la question :
Given q(x) = 7xsquared + 9, find q(-7)

These were the choices I had for the answers to this problem
1.) 343
2.) -40
3.) 334
4.) -89
5.) 352

Penny Nom lui répond.
1+1/1+1/x 2008-05-21
nadean pose la question :
1+1/1+1/x
Penny Nom lui répond.
The sides of a rectangle 2008-05-16
bill pose la question :
The area of the rectangle is 170 sq.ft. the width is unknown and the length is the width plus 7 ft. I set it up like this w(w+7)=170 and this is where I get lost. Thanks, Bill
Penny Nom lui répond.
The rectangle with smallest perimeter 2008-04-01
nicole pose la question :
when given an area,squares are the rectangles with the smallest perimeter write the length and width of the rectangle with the smallest perimeter
Penny Nom lui répond.
Algebraic fractions 2008-02-21
sergio pose la question :
how to simplify
(x^2 +5x+6)/(x^2 - 4) x (x^2 -5x+6)/(x^2-9)

Stephen La Rocque lui répond.
18x=6(x*x) 2008-02-20
peyton pose la question :
18x=6(x*x)
Stephen La Rocque lui répond.
Subtracting two algebraic fractions 2008-02-17
Willie pose la question :
Subtract and express the answer in simplest form. 5x-3/6-x+3/6
Penny Nom lui répond.
The angles in a parallelogram 2008-02-11
lauren pose la question :
if the sum of the measures are 360 in a parallelogram. a and d are same measures, c and b are same too. If c is twice the measure of a what are all the angles?
Penny Nom lui répond.
A 20 foot board is cut into two pieces 2008-02-11
Sherry pose la question :
A 20 foot board is cut into two pieces. If we let x= the length of the longer piece, what is the length of the shorter piece?
Stephen La Rocque lui répond.
Sum and difference of cubes 2008-01-30
Amanda pose la question :
It has been a really long time since I was in Algebra and I can't remember how to factor cubes such as x^3 +81 or subtracting/adding fractions with variables such as [1/(x+h)+2]-[1/x+2]. Please help!!!
Penny Nom lui répond.
8/9 + x = 9/5 2008-01-17
nas pose la question :
8/9+x=9/5
Penny Nom lui répond.
2 divided by x plus 1 is equal to 3 2008-01-14
chilly pose la question :
with x being the subject of the formula, what is the answer of 2 divided by x plus 1 is equal to 3?
Penny Nom lui répond.
2(x - 5) + 45 = 4 - (3 - 2x) 2008-01-09
Kieran pose la question :
Solve
2(x-5)+45=4-(3-2x)

Penny Nom lui répond.
An algebra exercise 2007-10-22
Math pose la question :
The number of moles of an ideal gas can be found from the formula:

PV/RT=N

solve the formula for "R", the ideal gas constant.

Penny Nom lui répond.
sin 43= y/20 2007-10-21
stefany pose la question :
if sin 43= y/20, what is the value of y to the nearest tenth?
Penny Nom lui répond.
3x2/3 = 12/3 2007-09-28
Shafan pose la question :
3x^2=12
Penny Nom lui répond.
The country with the most universities 2007-09-28
j pose la question :
the country with the most universities is india followed by the united states. If india has 2649 more universities than united state and there combine total is 14,165, find the number of universities in india and the number in the united states.
Stephen La Rocque lui répond.
1/2+X=5/8 2007-09-24
Tasha pose la question :
What is the sum of X in the problem below and explain your answer please?

1/2+X=5/8

Chris Langdon lui répond.
2x+1+x-4+4x+1 2007-09-06
laurie pose la question :
2x+1+x-4+4x+1
Penny Nom lui répond.
13 = x/20 2007-09-06
Melissa pose la question :
can u please help me with this question?
13 = x/20

Penny Nom lui répond.
The quotient of thirty and ten times a number. 2007-09-02
Jenna pose la question :
I need help on How to translate a phrase into an algebraic expression: The quotient of thirty and ten times a number.
Penny Nom lui répond.
Adding algebraic fractions 2007-08-14
John pose la question :
Ive completely forgot anything to do with the subject mentioned, so my question is straight to the point..

I need to know how to do the following problem (Preferably do not give me an answer though) (k/3k-8) - (4/k+2)

Penny Nom lui répond.
10r^2 - 35r = 0 2007-08-13
Aranxa pose la question :
how do u solve this equation by factoring: 10r^2 - 35r = 0
Penny Nom lui répond.
If x = 2 then 4 + 5x / 4 + x = ? 2007-07-18
Daniel pose la question :
If x = 2 then 4 + 5x / 4 + x = ?
Stephen La Rocque lui répond.
How many women and men math students are there? 2007-07-09
Bing pose la question :
there are 38 math students. How many men and women strudents are there if the women exceeded one half of the men by 17?
Stephen La Rocque lui répond.
Algebraic EquationsAx+By=C 2007-07-02
Juan pose la question :
The general "Standard" form of an equation is Ax+By=C. Re-Write this equation in slope-intercept (y=mx+b) form.
Harley Weston lui répond.
Algebra : 9x + 7 = 5x - 3 2007-06-15
Allen pose la question :
I am having a problem solving for x. The problem is: 9x + 7 = 5x - 3
Stephen La Rocque lui répond.
Algebra - find the number 2007-06-04
Fabiola pose la question :
When 4 times a number is increased by 40, the answer is the same as when100 is decreased by a number. Find the number
Stephen La Rocque lui répond.
2x + 3x = 30 2007-06-01
Jessica pose la question :
2x+3x=30
Stephen La Rocque lui répond.
Factor Completely 2007-05-29
Ema pose la question :
Question 1:
Factor completely. 3x(x – 4) + 5(x – 4)
Question 2:
Factor completely. x^2 + 2x + 3

Penny Nom lui répond.
y=mx+b 2007-05-29
molly pose la question :
Im having a problem with the y=mx+b for our homework we have a table that goes from 0 to 6 , 1 to 7 and 2 to 8 and we have to make a equation of that. Please help.
Penny Nom lui répond.
x/2+3=2 2007-05-28
Ethel pose la question :
what is the formula and the answer to x/2+3=2?
Penny Nom lui répond.
Algebra (Solve for B) 2007-05-23
Mark pose la question :
A = .250 * (B^2*SIN(C)) / (D*COS^2(E)). I need to solve for B.
Stephen La Rocque lui répond.
(3x-2(x-3)+2)(3x-2(x-3)+2) 2007-05-17
Jeff pose la question :
(3x-2(x-3)+2)(3x-2(x-3)+2)
Penny Nom lui répond.
Algebra problem 2007-05-10
Sam pose la question :
What is the proper answer for this equation?
3x - 2 ( 5y (4x +2))

Stephen La Rocque lui répond.
Pre-algebra volume of a prism 2007-05-10
Brenda pose la question :
Find the volume of a triangular prism with a base of 5 cm by 5 cm and a height of 12.5 cm. Round to the nearest tenth.
Stephen La Rocque lui répond.
Interest Rates 2007-05-09
Julia pose la question :
Using the formula I=PRT to figure out the missing variable.
P=$9530, T=7 months, A= $9919.14

Stephen La Rocque lui répond.
What number am I? 2007-05-09
austin pose la question :
i am a positive integer if im squared -5 is added to me. -10 is subtracted from me, and the remainder is divided by 2 the result is 7. what integer am i
Stephen La Rocque lui répond.
Who was the mathematician that united algebra and geometry? 2007-05-08
Victor pose la question :
who was the mathematician that united algebra and geometry
Penny Nom lui répond.
Algebra 2007-04-16
Eugene pose la question :
X over 2, -3 =0 ?
Haley Ess lui répond.
Algebra 2007-04-03
Emily pose la question :
9,365 and 2,242 added to the difference between 255 and half of a number is 11,784. What is the number?
Haley Ess lui répond.
An equation with fractions 2007-04-03
deanna pose la question :
x      x
-- + -- =8
9       3
need help with showing work and answer

Penny Nom lui répond.
-4x=1/5 2007-04-03
deanna pose la question :
-4x=1/5 need help with showing work and answer
Stephen La Rocque lui répond.
Find the expression that represents it perimeter. 2007-04-01
Amy pose la question :
A rectangle has sides of 3x-4 and 7x+10. Find the expression that represents it perimeter.
Steve La Rocque and Haley Ess lui répond.
Solve for x and y 2007-03-27
anthony pose la question :
solve y=4x and x+y=5
Sara Ulmer lui répond.
Examples of algebra used in life 2007-03-21
Arianna pose la question :
i need to find about 5 different examples of algebra used in life, and im not sure where to start. does anyone have any suggestions as to topics that i should choose for my project? thank you so much for all of your input. Arianna Leigh
Penny Nom lui répond.
18x - 5 = 3(6x - 2) 2007-03-19
Lordyne pose la question :
How do I work this math problem? 18x - 5 = 3(6x - 2)
Pam Fowler and Penny Nom lui répond.
Algebra 2007-02-13
B.Wilson pose la question :
The teacher has asked to solve the following, but I have never seen this before: 6x/2 = 4x/5
Haley Ess lui répond.
Dividing money unequally 2007-02-06
Linda pose la question :
I have a total of $13,826.48. It is to be divided by 15 kids - 2 of the kids only get half of what the other 13 do - how much do the 13 get and how much does the 2 get? Thanks
Haley Ess and Steve La Rocque lui répond.
Nickels, dimes and quarters 2007-02-05
Avinash pose la question :
Mary has 48 coins made up of nickels, dimes and quarters with a total value of $5.10. She has 4 more dimes than nickels and quarters combined. How many coins of each kind does she have? Use matrix to solve the system
Stephen La Rocque lui répond.
An algebra exercise 2007-01-24
Clara pose la question :
Given x + 2y = -2 and x - 2y = 18, find:
a) x^2 - 4y^2
b) x^2 + 4y^2

Stephen La Rocque and Penny Nom lui répond.
p=2l+2w find l 2007-01-23
Jadesola pose la question :
p=2l+2w find l
Stephen La Rocque and Penny Nom lui répond.
How do you write the equation y= 4x-2 in ax+by=c form? 2007-01-17
Evan pose la question :
How do you write the equation y= 4x-2 in ax+by=c form?
Penny Nom lui répond.
y = 5 x - 3 2007-01-10
Richard pose la question :
Question is the function y = 5 x - 3 for the given value of x 7 , 1 or 4
Stephen La Rocque and Penny Nom lui répond.
Products with symbols 2007-01-09
Jennifer pose la question :
Find the product of each
(8x)(-4)
(3x)(5y)(7z)
(8x^3y)-5X^2)
(6a)(3a)(-b^2)

Penny Nom lui répond.
Tiles arranged in rows 2007-01-02
Ann pose la question :
Some tiles are arranged in rows so that the number of tiles in each row is 8 more than the number of rows. The same number of tiles can be arranged in 3 more rows than the first pattern with 16 tiles in each row. Find the total number of tiles.
Stephen La Rocque lui répond.
6/x-2y - 15/x+y = 0.5 2006-12-21
Emeka pose la question :
6/x-2y - 15/x+y = 0.5
Stephen La Rocque lui répond.
How many M&Ms are in a container? 2006-11-01
Jill pose la question :
How do we algebraically figure out how many M&Ms are in a container?
Stephen La Rocque and Penny Nom lui répond.
How do you write a variable expression 2006-10-11
Josh pose la question :
How do you write a variable expression for the following:

The amount of money Waldo has if he has $10 more than Joe and

How much weight Kirk can lift if he lifts 30 lbs more than his brother.

Stephen La Rocque lui répond.
30+7(x-1)=3(2x+7) 2006-09-29
Art pose la question :
30+7(x-1)=3(2x+7)

I know with the distributive law I multiply 7 by x and 7 by -1 and the same thing to the right, only 3 by 2 and 7 than I am lost?
Penny Nom lui répond.

How many items must the company produce to begin to make a profit? 2006-09-24
Devon pose la question :
The profit a manufacturing company makes can be found using the formula P=120n - n^2 - 2200 How many items must the company produce to begin to make a profit?
Stephen La Rocque lui répond.
What was the total cost of the dinners he served 2006-09-10
Connie pose la question :
Walter is a waiter at the town diner. He earns a daily wage of $100 plus tips that equal to .15 of the total cost of the dinners he serves. What was the total cost of the dinners he served if he earned $170 on Tuesday?
Stephen La Rocque lui répond.
How much did I spend on the first trip? 2006-09-10
Alexander pose la question :
I have $600 to spend.
I take 10 shopping trips.
Each trip I spend $10 more than the last trip.

How much did I spend on the first trip?
Stephen La Rocque lui répond.

How many marbles are there? 2006-08-30
Cathey pose la question :
Four children are playing with marbles. At the end of the day, one child has four less than half the marbles. The second child has six more than one-fifth the marbles. The third child has one third of what the first child has and the fourth child has one less than the third child. How many marbles are there?
Stephen La Rocque lui répond.
How many total worker are in the factory? 2006-08-26
Sherine pose la question :
One quarter of the workers at the factory are clerical, one fifth are technical, half are are administrative,and the remaining 25 are managerial. How many total worker are in the factory?
Penny Nom lui répond.
A board is cut into two pieces... 2006-07-11
DeAnna pose la question :
A 102" board is cut into 2 pieces. One piece is two times the length of the other. Find the lengths of the two pieces.
Stephen La Rocque lui répond.
Two algebra questions 2006-07-02
Majeedah pose la question :

I'm upgrading thru correspondence and haven't been in school for a long while, so I have no class or teacher to explain the basics to me.

I have a couple of questions:

The problem is this:

  1. f(x) = x2 - 2, Find the expression.

    Q f(-x)
    A x2 - 2

    Why is the answer not -x2 - 2?

  2. A relation f, is given by f(x) = x - 2/x. Find the expression.

    Q 2/f(3)
    A 6

    How do you get the answer.


Stephen La Rocque lui répond.
simplify 7x + 4y + 2x - 6y 2006-06-21
Alan pose la question :
simplify 7x + 4y + 2x - 6y
Paul Betts lui répond.
The hardest algebra question you know 2006-06-08
Steven pose la question :
could you send me the hardest algebra question you know and the work with it , i want to test a tutor. he a friend.
Stephen La Rocque lui répond.
Solving an equation without using algebra 2006-05-01
Kenneth pose la question :
How can the following be solved without using algebra? 10 times some number is 3 times the same number plus 14.
Paul Betts lui répond.
Finding the supplementary angles 2006-04-22
Kendra pose la question :
Angles ABC and DBA are supplementary. If m
Stephen La Rocque lui répond.
Finding c in 4x=10-cy 2006-04-19
Jennifer pose la question :
A solution of the equation 4x=10-cy is (5,2). What is the value of c?
Stephen La Rocque lui répond.
x-7=20 and 2x+5=17 2006-04-04
Janette pose la question :
I'm trying to help out my daughter, it has been much too long since I've been in school. The question is x-7=20 and the other question is 2x+5=17. What are the formulas?
Penny Nom lui répond.
what is 9x3h for h = 2 2006-03-25
Dillon pose la question :
what is 9x3h for h = 2 just don't get it.
Penny Nom lui répond.
Two squares 2006-03-25
Debbie pose la question :
A small square is constructed. Then a new square is made by increasing each side by 2 meters. The perimeter of the new square is 3 meters shorter than 5 times the length of one side of the original square. Find the dimension of the original square
Stephen La Rocque lui répond.
The kangaroo high school band 2006-03-12
Cristy pose la question :
Two hundred students joined the kangaroo high school band. Based on statistics from previous years, 1/3 of the students will drop out. of the remaining members, only 6% will qualify for the state band. How many of the original members can be expected to qualify for the state band?
Stephen La Rocque lui répond.
How many students and how many cookies are there? 2006-03-10
Stephanie pose la question :
A group of students is trying to evenly divide the cookies remaining from a bake sale. If each student takes three cookies, there are five cookies left. If each student takes four cookies, they are two cookies short. How many students and how many cookies are there?
Penny Nom lui répond.
25+36+12=52+m, m= 2006-03-02
Jenny pose la question :
25+36+12=52+m, m=
Stephen La Rocque lui répond.
Separate 35 into two parts such that 4 times the larger is 4 less than five times the smaller 2006-03-01
Barbara pose la question :
Separate 35 into two parts such that 4 times the larger is 4 less than five times the smaller
Stephen La Rocque lui répond.
8 - 5r / 6 = 3 2006-02-15
Scott pose la question :
I was trying to help my daughter with the following problem:

8 - 5r / 6 = 3

Can you give me a quick refresher.


Stephen La Rocque lui répond.
How long and how wide is the table? 2006-02-02
A student pose la question :
the perimeter of a table is 24 feet. the table is twice as long as it is wide. how long and how wide is the table?
Penny Nom lui répond.
The sum of two numbers is 21. 2006-01-31
Dan pose la question :
The sum of two numbers is 21. One number is three less than the other. Find the numbers
Penny Nom lui répond.
The three angles in a triangle 2006-01-23
A student pose la question :
the measure of the 2nd angle in a triangle is 4 more than the measure of the 1st angle. the measure of the 3rd angle is eight more than twice the measure of the 1st angle. find the measure of each angle.
Penny Nom lui répond.
y - y1 = m(x - x1) 2006-01-08
Greg pose la question :
How do you change 2x + 3y = 7 into y - y1 = m(x-x1)?
Penny Nom lui répond.
Why do we bother learning pre-algebra and algebra 1? 2005-12-23
Priya pose la question :
My students always ask "Why do we bother learning pre-algebra and algebra 1?" and I haven't found an answer to satisfy them yet. Can you help me? My students are from grade 9 to 11. I have tried giving them real life examples in each topic but it just feels like they are not satisfied!!!
Penny Nom lui répond.
A rectangle has a length that is 7cm more than twice the width 2005-12-21
Stephanie pose la question :
A rectangle has a length that is 7cm more than twice the width. The area of the rectangle is 60cm squared. Find the dimensions of the rectangle.
Penny Nom lui répond.
Skeeball 2005-12-21
Jenny pose la question :
Kira and Dajuan decided to have a Skeeball contest. They each played one game to see who would get the highest score. A description of their contest follows:
Denis Hanson lui répond.
If 7 times a number is decreased by 8 ... 2005-12-17
Joyce pose la question :
If 7 times a number is decreased by 8, the result is the same as when 3 times the number is increased by 6. Find the number.
Penny Nom lui répond.
Pat invested a total of $3000 dollars 2005-12-14
Duane pose la question :
Pat invested a total of $3000 dollars. part of the money yields 10 percent interest per year and the rest yields 8 percent interest per year if the total yearly interest is $256 how much did pat invest at 10 per cent and how much at 8 percent.
Penny Nom lui répond.
2/n +4 = 10- 4/3n 2005-12-11
Jennifer pose la question :

2/n +4 = 10- 4/3n

5(x-3/4) = x+1


Penny Nom lui répond.
Solve for x 2005-12-04
Lisa pose la question :
5(x-4)=3(2-3x)
Penny Nom lui répond.
An integer equation 2005-12-01
Henry pose la question :
3x = 2y + 7

I know the answer: x=9 and y=10, but what are the algebraic steps to solve the equation?

Penny Nom lui répond.
Solve for g 2005-11-09
Cassandra pose la question :
solve each equation or formula for the variable specified

5g+h=g, for g

Penny Nom lui répond.
Coefficients, constants and like terms 2005-10-05
Elizabeth pose la question :
In the equation -8y+6ab+7-3ab what are the coefficients; the like terms and constants?
Penny lui répond.
2x/x^2-9 - 6/x^2+x-12 2005-09-27
Emily Ann pose la question :
2x/x2-9 - 6/x2+x-12
Penny Nom lui répond.
6x+7=8x-13 2005-09-27
A student pose la question :
show me how to do 6x+7=8x-13
Penny Nom lui répond.
14p - 8 = 22 + 20p 2005-09-27
Tiffany pose la question :
14p - 8 = 22 + 20p
Penny Nom lui répond.
x = (y^2 - b^2)/2b 2005-09-04
Bob pose la question :
while looking at x=(y2-b2)/2b on a table I was preparing for a graph, I saw that there is a point where x and y get closer to each other's value. By trial and error I tried to find the point where x=y. I saw a number which looked familiar and I realized it was the square root of 2. and so, if y=b(1+square root of 2) then x=b(1+square root of 2) also, or as x=y.
My question is: How can this result x=y when y=b(1+square root of 2) be algebraically derived from the equation x=(y2-b2)/2b without pre knowing it is so?

Penny Nom lui répond.
3A/4 +1=(2A-1)/3 2005-08-21
Rachael pose la question :

I'm doing a practice test question and the answer I keep turning out is different from the answer on the answer sheet. I think I might be forgetting a step. The problem is:

3A/4 +1=(2A-1)/3

The answer is -16. If anyone could explain the steps to me to getting the answer I would be grateful. Whenever I do it I get something completely different.


Penny Nom lui répond.
Solve for x 2005-07-20
Ed pose la question :
(x-1)/3 - 1 = (x + 2)/2
Penny lui répond.
Explain why 3(x+2) = 3x+2 is incorrect 2005-03-28
Cynthia pose la question :
An algebra student incorrectly used the distributive property and wrote 3(x+2) = 3x+2. How would you explain to him the correct result, without the use of the distributive law?

Explain why the square of the sum of two numbers is different from the sum of the squares of two numbers.

Penny Nom lui répond.
A product equals a sum 2005-03-27
Tor pose la question :
Can you please help me with a general formula for the following system:
2+2=2*2
3+3/2=3*3/2
4+4/3=4*4/3

and how will you prove the formula?


Penny Nom lui répond.
Multiplying two algebraic fractions 2004-10-31
A parent pose la question :
Multiply:

x+2 x˛-4
----- x -------
x-2 x˛+x-2


Harley Weston lui répond.
The price of a book 2004-09-18
Dorly pose la question :
If the number of toonies required to buy a book is nine more than the number of five-dollar bills required to buy the same book, determine the cost of the book.
Penny lui répond.
Pizza for Jack? 2004-09-16
Grace pose la question :
Jack is playing pool with Jim for $1 a game. He has only $2 and decides to play until he goes broke or has $5, at which point he will quit and go out for a pizza with Jim(Dutch treat). Jack knows from past experience that he beats Jim 60% of the time. What is the probability that Jack will get to eat pizza? Hints: Let A be the 6x6 matrix defined by A=[aij], where aij is the probability that Jack will have $(i-1)after one game is he starts with $(j-1). For example, a23 - .40 since there is a 40% probability that Jack will end up with $1 after a game is he starts the game with $2 (If Jack wins 605 of the time, he must lose 40% of the time). Also, for example, a52 = 0 since there is no way jack can have $4 after one game if he had $1 at the beginning of the game. Since Jack will stop if he goes broke or accumulates $5, a11 and a66 are both 1.

Let x0 = [0 0 1 0 0 0 ] transposed, which we interpret as saying that initially Jack has $2 with a probability 1. Then Ax0 will represent the porbability of each amount of money, $0-$5, after one game. What is the probability that Jack will be able to eat pizza by computing Akx0 for large k and finding a limiting value.

Penny Nom lui répond.
Three word problems 2004-09-12
Adrian pose la question :

1. Increasing area of a field: Julia's soybean field is 3m longer than it is wide. To increase her production, she plans to increase her to increase both the length and width by 2m. If the new field is 46m2(2nd power) larger than the old field, then what are the dimensions of the old field?

2. Width of a Football Field: If the perimeter of a football field in the NFL including the end zones is 1040 ft and the field is 120 yd long, then what is the width of the field in feet?

3. Fencing dog pens Clint is constructing two adjacent rectangular dog pens. Each pen will be three times as long as it is wide, and the pens will share a common long side. If Clint has 65 ft of fencing, what are the dimensions of each pen?


Penny Nom lui répond.
(2x+5y-6) + (3x-4y+12) 2004-09-04
GG pose la question :
I am a grade 9 student and i do not understand a question. Plz help! OK here it is........ (2x+5y-6) + (3x-4y+12)
Penny Nom lui répond.
Simplify 2004-06-27
Tiff pose la question :
Simplify:

-3x (x2 + 2)

(x + 2) (x + 3)

Penny Nom lui répond.
Volume of a box 2004-05-23
A student pose la question :
The area of the top of a closed rectangular box is 252cm2, the area of the front of the box is 105cm2, and the surface of the box is 834in2 (or 5380.64cm2). What is the volume of the box?
Penny Nom lui répond.
Subtracting fractions 2004-05-11
Filipe pose la question :

Question:
_5_ - __7__
6ab 8a


Penny Nom lui répond.
Area and perimeter 2004-03-12
Sandy pose la question :
The rectange has an area of M square units and a perimeter of 2M units. What is the value of x?

The length of the rectange is 3, while the width of the rectange is x-1.

Penny Nom lui répond.
Three numbers are added in pairs 2004-02-12
Jane pose la question :
When three numbers are added in pairs, the sums of the pairs are 22, 39, and 45. What are the three numbers?
Penny Nom lui répond.
Difference of squares 2003-11-24
Susie pose la question :

Factor assuming that n is a positive #

Problem: (I will give it to you in words beacuse I don't know how to do exponents on the computer.) Forty-five r to the 2n power minus five s to the 4n power. I was hoping you could walk me through it not just give me the answer.


Penny Nom lui répond.
4(r-2) = r(2+8) 2003-11-20
Angela pose la question :
I not going to give you the problem that I have, but a problem like it. 4(r-2) = r(2+8) I get mix up trying to solve a problem like this could you help me. So that I will be able to handle the ones on my homework.
Penny Nom lui répond.
Solve for Q 2003-11-03
Anwaar pose la question :

The problem is:

QT - X
________ + H = HT
QS


Peny Nom lui répond.
Solve for x 2003-10-27
Lonnie pose la question :
i need help with solving equations and formulas such as -3x+b=6x, for x. I do not understand how you find x.
Penny Nom lui répond.
Domain of a function 2003-10-14
Karim pose la question :
Find the Domain of the Function
H(x) = Log3 (4x + 7)-10
H(x) = log base 3 times 4X plus 7 minus 10
i am having problem solving these kinds of problems.

Penny Nom lui répond.
5x - y 2003-10-11
Candace pose la question :
math problem 5x-y for x=12 and y=14 do you mulitilpy 5x12 and than -the answer from 14 which gives you 46? is this right
Penny Nom lui répond.
Area of a rectangular room 2003-09-11
Kelly pose la question :
The area of a rectangular room is 238 square feet. The width is 3 feet less than the length. What are the dimensions?
Penny Nom lui répond.
The quadratic formula 2003-08-31
Alex pose la question :
I am using Houghton Mifflin's Precalculus with Limits book, 2nd edition. However, the first chapter encompasses Algebra review, and I am stuck on a problem. All that's required is to solve the following and verify using a calculator:
3y2+6y+2=0
I have solved the problem using the quadratic formula, but from what I remember, the quadratic formula is used in the case of equations following the AX2+BX+C=0 pattern. As the problem I am attempting uses a y-variable, can I still use the quadratic formula? Since I am not sure what route to take in solving this problem, I am hoping you can assist me.

Harley Weston lui répond.
The domain of 1/g(x) - 5 2003-07-03
Barbara pose la question :
If the range of g(x) is ( neg. infinity,4] and the domain of g(x) is ( neg. infinity, infinity), how do I find the domain of 1/g(x) - 5?
Penny Nom lui répond.
ABCD*4 = DCBA 2003-05-07
Dee pose la question :

In the following problem, if the letters A, B, C and D represent some number, what numbers would they represent so that:

ABCD*4 = DCBA


Penny Nom lui répond.
Two intersecting graphs 2003-04-23
Patty pose la question :

a) graph the equation

x2 - y - 4 = 0

x2 + y2 = 9
on the same set of coordinate axes.

I did not have a problem with this.

The problem is part (b) of the question ask: Find all solutions of the system in part (a) algebraically. Express answers in decimal form, accurate to two decimal places.


Penny Nom lui répond.
The substitution method 2003-04-14
Patty pose la question :

I need help with the following:

5x - 4y = 13

2y + 3x = -1


Penny Nom lui répond.
12*nC2 = n! 2003-03-30
A tutor pose la question :
Solve for "N"

12*nC2=N!

Walter Whiteley lui répond.
Two algebra problems 2003-03-18
Kayla pose la question :
1st question- If a+b divided by a equals 6 and b+c divided by c equals 9, compute the numerical value of a divided by c. ( Your answer will be mumbers only, no variables.)

2nd question- Three adjacent faces of a box (a rectangular prism) have areas of 7, 14, and 18 square inches. Find the volume of the box. (Hint: Choose variables to represent the three sides of the box and then figure out the problem.)

Peny Nom lui répond.
Monomials 2003-03-11
Roxy pose la question :
Explain why (x+y)z is not equal to xz+yz? P.S. Z is an exponent
Penny Nom lui répond.
Sasha's candies 2003-02-18
Pat pose la question :
Tick-tac-toe

Sasha and Trudy are playing tick-tac-toe. Sasha agrees to give trudy two pieces of candy for each game Sasha loses, and Trudy agrees to give Sasha three pieces of candy for each game that Trudy loses. After playing thirty games, Sasha has the amount of candy that he started with. If no ties occurred, how many games did Sasha win?

Paul Betts lui répond.
Factoring a trinomial 2003-01-26
A student pose la question :
how do you factor: Xsquared + 8x + 12
Penny Nom lui répond.
Two numbers have a ratio of 5:3 2003-01-01
Patricia pose la question :
Two numbers have a ratio of 5:3. The larger number is 36 more than half the difference of the two numbers. What are the two numbers?
Penny Nom lui répond.
Find a, b and c 2002-12-10
Sameer pose la question :
Question:

a+b+c=180
b=a+(120/2-5)
c=b-(130-10)/6
a=?
b=?
c=?

Penny Nom lui répond.
[x*(x+2)] + 1 = (x+1)(x+1) 2002-11-27
Melissa pose la question :
While teaching the multiplication table to my daughter I noticed an interesting pattern. It goes something like ...Take a whole number
...add two to it
...multiply the two numbers together
...add one to the resulting number
...it will now be equal to the original number plus one, squared.

Claude Tardif lui répond.
The substitution method 2002-11-15
A student pose la question :
Solve by using the substitution method.

x = 3y - 1
x + 2y = 9


Penny Nom lui répond.
Algebra 2002-11-13
Carol pose la question :
I am a confused parent trying to help my dau hgter solve some math problems and I need help.

3[x-4]=27


Penny Nom lui répond.
(93+n)+158=93+(28+158) 2002-11-10
Parents pose la question :
(93+n)+158=93+(28+158)
Penny Nom lui répond.
G = 3H - 5 2002-11-07
Kash pose la question :
G=3H-5, for H solve for the given variable
Penny Nom lui répond.
18m-11+ -7 2002-11-06
Sophia pose la question :
what is 18m-11+ -7 (m = to 12)?
Penny Nom lui répond.
Mrs. Klein has been losing 1 pound a week for the last year 2002-10-30
Brett pose la question :
On her diet, Mrs. Klein has been losing 1 pound a week for the last year. Her husband weighs 110 pounds more than she does now. If his weight is twice what her weight was 6 weeks ago, how much does mrs. Klein weigh now?
Penny Nom lui répond.
Jimmy's hits 2002-10-27
Patty pose la question :
One seventh of Jimmy's hits were doubles
12.5% of his hits were homeruns
Jimmy had 82 singles
He did not have any triples

How many hits did Jimmy have? (Be sure to include the equation that represents the number of hits)

Penny Nom lui répond.
How many trees were planted in March? 2002-10-20
Allison pose la question :
The number of trees planted by the Alpine Nursery in April was 3 more than twice the number of trees planted in March. If 71 trees were planted in april, write and solve an equation to find how many trees were planted in March.
Penny Nom lui répond.
Simplify 2002-10-19
A student pose la question :
well i need to simplify this problems out and i cant do it so here is one
 3x^2+6x-45 ------------ = 3x^2+21x+30 

Penny Nom lui répond.
Three algebra problems 2002-10-13
Veronica pose la question :
Solve the following inequality:

5(xsqured-4)/(xto the 5th(2x-5)to the 3rd) < or equal 0

Solve the following equations for all roots

square root of x+2=-1+square root of 2x+3

what's ZERO FACTOR PROPERTY???

The hypotenuse of an isosceles right triangle is 7cm. long. Determine the lenghts of the other sides.


Leeanne Boehm lui répond.
$100 is split between four guys. 2002-10-03
Stephan pose la question :
$100 is split between four guys. A,B, C, and D. How much money does if person get if B has four more dollars than A, C has 8 more dollars than B, and D has twice as much money as C?
Penny Nom lui répond.
Formulating equtions 2002-09-14
Theresa pose la question :
Hello. In math class we have to formulate equations for certin questions for extra credit. We are allowed to ask anyone and anyone can do it for us and explain it to us. Could you please do that? Here are the questions
  1. Jordan has 3 times as much money as Reva. Together they have $44. How much money does each have?

  2. The Tigers played 48 games. They won twice as many as they lost. How many did they win?

  3. There are 900 students in Sewickley Academy. There are 20 more girls than boys. How many girls are there?

  4. A board 400 cm long is cut into 2 pieces. One piece is 66 cm longer than the other. Find the lenght of the shorter piece.


Penny Nom lui répond.
Algebra 2002-09-08
Heather pose la question :
This question is from an 8th grade Algebra classs. I am a parent asking for help to explain to my child. Q: d=25t2.
Leeanne Boehm lui répond.
Express 5120 as a sum of consecutive numbers 2002-08-25
Todd pose la question :
Express 5120 as a sum of more than 1 consecutive number.
Leeanne Boehm lui répond.
Variable expressions 2002-08-15
Brittany pose la question :
I am just learning variable expressions. My homework is to write a variable expression for each word phrase;

example :

the number of minutes in s seconds
the cost of x cartons of juice at $.75 each
And etc.

I don't understand it

Penny Nom lui répond.
x + 5 + x, if x = 4 2002-07-23
Elisa pose la question :
x + 5 + x, if x = 4
Leeanne Boehm lui répond.
Jack and Jill wrote letters 2002-06-19
Angel pose la question :
jack and jill each bought a stationary
# of sheets of paper in each box were the same
# of envelopes were the same
jill wrote letters consisting of 3 pages
jack wrote letters consisting of 1 page

when they wrote all letters jill had 50 envelopes left and jack had 50 sheets of paper left how many pieces of paper and how many envelopes?

Leeanne Boehm lui répond.
The cross country team 2002-06-12
Denae pose la question :
In cross country, a team's score is the sum of the first five finishers on the team. The captain of the team finished 2nd in the meet. The next four finishers on the team placed in consecutive order. The team score was 40. in what places did the other members finish?
Penny Nom lui répond.
A polynomial 2002-06-05
Melissa pose la question :
I'd like to know what is a polynomial( the definition and an explication)? And is 7x a polynomial? and why?
Penny Nom lui répond.
One-fourth of a number is added to one-third of the same number 2002-05-26
A student pose la question :
When one-fourth of a number is added to one-third of the same number, the result is 28. What is the number?
Penny Nom lui répond.
| n + 4 | + | 3 - 2n | = 16 2002-05-24
Randall pose la question :
I don't seem to be able to solve this: | n + 4 | + | 3 - 2n | = 16
Penny Nom lui répond.
Find the angle measures 2002-05-18
Amanda pose la question :
In triangle ABC; the measure of angle A is 20 degrees more than twice the angle B. The measure of angle C Is five times angle B. Find the angle measures.
Penny Nom lui répond.
Some algebra 2002-05-11
A student pose la question :

/x - 2 ^4/x = 8

/ = square root sign
^ = 4th root of x

also, dividing
2x3 -3 -6x
__________
4 + 2x

the 2x3 is 2x to the third


Penny Nom lui répond.
3 = -2x 2002-05-05
Timothy pose la question :
My question is 3 = -2x

How do I isolate the variable here?


Penny Nom lui répond.
Factor 12x^2 - 20x - 8 2002-04-30
Crystal pose la question :
Factor Completely: 12x2 - 20x - 8
Penny Nom lui répond.
25m = 100 2002-04-22
Megan pose la question :
If 25m = 100, Then m equals what number?
Penny Nom lui répond.
An augmented matrix 2002-04-20
A student pose la question :
Hi my math teacher asked us to solve an augmented matrix. I am in twelfth grade and need help. The book we are working on is college algebra. Here it is

a+2b+c=0
2a+5b+4c=-1
a-b-9c=-5


Penny Nom lui répond.
Solving for x 2002-04-19
Susan pose la question :
I'm having a little trouble solving these equations for x. I can't seem to separate x fully from the other numbers. Please help! Here are the problems:

(2x-1)/(x-2)(x 2+3) = 0 and

y/(x+1)=z/x
Penny Nom lui répond.

Two algebra problems 2002-04-14
Ashley pose la question :
Question 1: For all values of a, let < a > be defined as < a > = 4a - 4 . Which of the following equals < 6 > - < 5 >? A: < 2 >
B: < 3 >
C: < 4 >
D: < 5 >
E: < 6 >

Question 2: If 5n + p = 3 and 2m - 10n = 2, what is the value of m + p?


Penny Nom lui répond.
3/4n-6=12 2002-04-07
Diane pose la question :
I am in 6th grade advanced math and I just started Algebra. My teacher tries to explain it to me but I just can't get it. I am having difficulty understanding it. Please HELP!!! I will type a problem, if you could answer it and show your work so i can understand it that

would be great. Please explain in simple terms.

here is a couple problems I am having trouble with,

PROBLEM #1

3/4n-6=12


Penny Nom lui répond.
If the matrix A is inverible and AB =AC, then B = C 2002-03-27
Vikki pose la question :
i hope you can help i am soooo stuck here goes:

a)

 A= 0 1 B= 1 1 c= 2 5    0 2    3 4    3 4 
A,B and c are matrices

Evaluate AB and Ac (which I can do)

then

b)
I need to prove that if the matrix A is inverible and AB =AC, then B = C. Why does this not contradict what happened in part a)?
Leeanne Boehm lui répond.

Adding algebraic fractions 2002-03-20
Dolores pose la question :
I get totally confused with this problem. I get confused with the getting the lowest terms.

4/x-5 + -2/x -10/x^2-5x


Penny Nom lui répond.
Simplify this expression 2002-02-26
Francine pose la question :
2X power 5 Y power 3 times 18 X power -5 Y power -3 divided by X power 1/3 Y power 1/4.

I came up with
     36 ---------- X 1/3 Y 1/4 
The book says 36 x1/3 y1/4.
I don't get it.

Penny Nom lui répond.
Adding algebraic fractions 2002-01-23
Francine pose la question :

Hello, I've come up with an answer for the following problem but it's not the same as the book's answer. However, the book has a lot of mistakes in it and I don't know if I'm doing it properly or not. Your help would be soooo appreciated. It's driving me crazy.The problem is:

   
  2             + 3          + 4 
---------  +  ---------  +  ---------- 
(x-1)^3        (x-1)^2       (x-1) 

[(x-1)^3 is (x-1) to power of 3 etc.]


Penny Nom lui répond.
Algebra review questions 2002-01-14
A student pose la question :
  1. A wildebeast was observed racing a distance of 86.4m in 4.8 seconds. Find the speed of the wildebeast in m/s.

  2. 8x - 7 - 5x = 23

  3. 7 z - 3 (z + 2) = 26

Penny Nom lui répond.
A simplification problem 2002-01-10
A Parent pose la question :
FIND

(A / B) . (C / D)
where
A = Y squared + 3 . Y cubed
B = Y squared + 4
C = 2 . Y + Y squared
D = Y + 4 Y squared + 3 Y cubed


Penny Nom lui répond.
Two algebra problems 2001-12-24
Cass pose la question :
if the graph of a equation is 2x2 - y2 = 8 passes through point (6,k), find the positive value of k.

if 5x2 - 2 x = 1, find positive value of x


Penny Nom lui répond.
Composition of functions 2001-12-16
Paula pose la question :
  1. if f(x)= 3x-1 and g(x)= 1/2x + 3 find fog(2)

  2. find the values of x for which tanx=0

Penny Nom lui répond.
Algabra 2001-12-13
Stephanie pose la question :
My name is Stephanie. My grade 7 class is doing some strange form of algebra which I've never done nor seen before. We are doing equations like these: 3y - 6 + 7 - 4y = 6y - 6. I don't really understand them and was wondering if you could help me do my homework and explain how to at the same time. It would be really great if you could!!!!! Thank you so much! -Stephanie
  1. -9x - 5 - 8 + x = ?

  2. 5 + 6x - 3y + x + 8y = ?

  3. -x - 3 + 5x + 6y + 8x - 9= ?

Penny Nom lui répond.
y = zx - x - c 2001-12-11
Andrew pose la question :
Could you please help me work out the value of x where: y = zx - x - c
Penny Nom lui répond.
y= (3x+2)/(4x-5) 2001-12-05
Courtney pose la question :
y= (3x+2)/(4x-5)
solve for x

Penny Nom lui répond.
what number doubled plus 20 will give you 4/3 the original number 2001-11-15
Hank pose la question :
what number doubled plus 20 will give you 4/3 the original number

2 x__ + 20 = 4/3 of the original number

Penny Nom lui répond.
(a+b) squared and a squared plus b squared 2001-11-14
Kristen pose la question :

(a+b)2 = a2 + b2

Is this true for all whole numbers, and why?


Penny Nom lui répond.
A cubic 2001-11-10
Louise pose la question :
x3 + 9x2 - 7x - 63
Penny Nom lui répond.
1 minus 5(y) equals negative 2 2001-11-10
Judy pose la question :
1 minus 5(y) equals negative 2
Penny Nom lui répond.
A circle and triangle overlap 2001-11-09
Tara pose la question :
A circle and triangle overlap as shown.the area of the circle is three times the area of the triangle.If the common region is removed,then the area of the rest of the circle would be 14 sq cm more than the area of the rest of the triangle.How many sq cm are in the area of the complete triangle.
Penny Nom lui répond.
8w-15 = 3w-10 2001-11-01
A student pose la question :
8w-15=3w-10, w =?????
Paul Betts lui répond.
m - 8 2001-10-30
Danita pose la question :
Can you please e-mail me the answer to m -8 for m = 20 and how you got the answer
Penny Nom lui répond.
An algebraic fraction 2001-10-25
brandi pose la question :
4x - 5
_____ =4
3-7x

Penny Nom lui répond.
Dimensions of a frame 2001-10-16
Rachel pose la question :
A rectangular picture frame has a perimiter of 44.2 cm.The width of the frame is seven tenths of its length what are the dimensions of the frame?
Penny Nom lui répond.
Some algebra 2001-10-15
James pose la question :
I cannot figure these out I was wondering if you could help me? I have no one to answer my questions.
  1. (7x2 – 3yz)2 – (7x2 + 3yz)2

  2. Use Pascal’s triangle to expand (2x – y)4

  3. 8x3 y - x3 y4

  4. (m + 3n)2 – 144

  5. 12x4 y – 16x3 y2 – 60x2 y3

  6. p3 q2 – 9p3 + 27q2 – 243

Peny Nom lui répond.
Simplify the expression 2001-10-08
Natalia pose la question :
simplify expression

4(x-7)+(-5x)=-10


Leeanne Boehm lui répond.
Investing in a yacht 2001-09-26
Junior pose la question :
Marvin and his four friends wish to invest in a yacht by sharing equally in the cost. As the date of sale approaches, Marvin realizes that if three more people join the partnership, each partner's share would decrease by $18,000. How much does the yacht cost?
Penny Nom lui répond.
Solve for h 2001-09-17
Kim pose la question :
s=2lw+2wh+2hl solve for h
Penny Nom lui répond.
Multiplying binomials 2001-09-08
A student pose la question :
(x+1)(x+2)=?
(2x-1)(x-4)=0
please tell me this question!!

Leeanne Boehm lui répond.
Matrix reconstruction 2001-07-19
Guy pose la question :
Is there a way to get the sums of rows, columns and diagonals of an n x n matrix to reconstruct the original matrix?
Walter Whiteley and Patrick Maidorn lui répond.
Simplifying algebraic expressions 2001-05-12
A student pose la question :
How do you simplify algebra expressions?
Penny Nom lui répond.
Solving some equations 2001-04-16
Justin pose la question :
Solve the following equations for x
  1. x+7=10
    x=

  2. x-7=10
    x=

  3. 3x=7
    x=

  4. x/3=10
    x=

  5. .

  6. .

  7. .

  8. .

Penny Nom lui répond.
Parabola problems 2001-04-10
Kathleen pose la question :
  1. Graph each function and state its domain and range. y = 3x2 + 4

  2. For each parabola find: i) the direction of opening
    ii) the coordinates of the vertex
    iii) the y-intercept
    iv) the x-intercepts
    y = x2 + 3

  3. Find the equation of each parabola vertex at (0, -2) and passing through the point (3,7)

Harley Weston lui répond.
(8 + 5)5 = (y + 4)4 2001-04-01
Kelley pose la question :
(8 + 5)5 = (y + 4)4
What is the value of y?

Penny Nom lui répond.
Factoring 2001-03-22
Kaleena pose la question :
Factor this equation: 5x7-10x5+4x3-8x
Harley Weston lui répond.
Radicals 2001-03-18
Nikki pose la question :
3) squareroot of x2 + 10x + 25

4) sixthroot of (m + 4)6

5) cuberoot of -64r6w15

.
.
.
.

Penny Nom lui répond.
Powers 2001-03-04
A student pose la question :
Hey, can you show me how you do ..

(2xy)to the 3rd power (x) to the 2nd power?


Penny Nom lui répond.
What is the value of n? 2001-03-03
Adam pose la question :
When I add n to 7 and then divide my answer by 4,I get 5. What is the value of n?
Penny Nom lui répond.
Solve for the variable 2001-02-28
Ashley pose la question :
I've got 2 questions. We (my dad and I) can not figure them out. please help me.
  1. 21 = 9 - 2 (4a + 2) and I am supposed to find out what the variable is.

  2. 2/3 n + 3/8 n = 15/16 (those are fractions). Again, I need to find out what the variable is.

Penny Nom lui répond.
Three sheep 2001-02-28
A student pose la question :
A farm sold three sheep. the weight of the three sheep combine wae 152 lbs. The smallest sheep weighted 7 lbs less than the middle size sheep. The largest sheep weighted three times the smallest sheep. what is the weight of each sheep?
Penny Nom lui répond.
Difference of Squares 2001-02-22
Bruno-Pierre pose la question :
I noticed the other day that if you substract two consecutive squared positive numbers, you end up with the same result as if you add up the two numbers.

Ex. 5 and 6 (2 consecutive positive numbers)
52 = 25
62 = 36
36 - 25 = 11 (Substraction of the squared numbers)
5 + 6 = 11 (Sum of the numbers)

A more algebric view:
a2 - b2 = a + b where a and b are consecutive positive positive numbers. (b = a + 1)

I wondered if this rule had a name, and who discovered it.


Penny Nom lui répond.
Difference of squares 2001-02-20
Janna pose la question :
Hi! I was just wondering how you would factor x2 - 9y2.
Harley Weston lui répond.
g(g+5)=0 2001-02-20
Jenna pose la question :
g(g + 5) = 0
Penny Nom lui répond.
Dividing polynomials 2001-02-19
Janna pose la question :
I have two questions involving dividing polynomials by polynomials.

Here's the first one:

Two factors of 12a4 -39a2 + 8a - 8a3 + 12 are a - 2 and 2a + 1. Find the other factors. The other question I'm stuck on is: When 10x3 + mx2 - x + 10 is divided by 5x-3, the quotient is 2x2 + nx - 2 and the remainder is 4. Find the values of m and n.


Penny Nom lui répond.
Adding functions 2001-02-19
Jackie pose la question :
f(x) = x2 + 1; g(x) = x2 - 1

find
a) ((f+g) of h)) (x)
b) ((f-g) of h)) (x)
c) ((f of h) - (g of h)) (x)


Penny Nom lui répond.
A quartic equation 2001-02-15
George pose la question :
Let P(x) = x4 + ax3 + bx2 + cx + d. The graph of y = P(x) is symmetric with respect to the y-axis, has a relative max. at (0,1) and has an absolute min. at (q, -3)

a) determine the values for a, b c, and d using these values, write an equation for P(x)
b) find all possible values for q.


Harley Weston lui répond.
Linear equations 2001-02-13
Jamie pose la question :
I have a question how do you do linear equation?
Penny Nom lui répond.
Rewrite as an addition problem and Simplify 2001-02-13
A student pose la question :
On my homework sheet it says "Rewrite as an addition problem and Simplify" and the gives this problem "16 - 120 ="
how do i do that problem?

Penny Nom lui répond.
L - R 2001-02-12
A student pose la question :
If L = (a-b)-c and R=a- ( b-c), then L-R = ???
Penny Nom lui répond.
Chris' cards 2001-02-11
A student pose la question :
Chris gave Jane x cards. He gave Bety one card more than he gave Jane and he gave Paul two cards fewer than he gave Betty. In terms of x, how many cards did Chris give Bety, Jane, and Paul together?
Penny Nom lui répond.
Some algebra 2001-01-23
Thomas pose la question :
If a is 4 more than the quotient of b and 3, and if b=2, then what is the value of a?
Penny Nom lui répond.
A piecewise linear equation 2000-11-24
Jacky pose la question :
There is a light bulb and it is given that the light bulb cost $0.75 and the cost of operating it is $0.0081 per hour. From the information give, I came up with the linear equation: Let c be total cost and Let h be hours used. Therefore: c = 0.0081h + 0.75 represents the total cost of the light bulb and the electricity. However, the second part of the question added the fact that the light bulb will only last for 800 hours. If the light bulb is replaced as soon as it burns out exactly after every 800 hours, how can I write an equation that represents that? Is it possible? What would it look like on the graph.
Harley Weston lui répond.
Integral solutions 2000-11-20
David pose la question :
determine all pairs of integers (x,y) which satisfy the equation

6x2 - 3xy - 13x + 5y = -11

I got

y= (6x2-13x+11)/(3x-5)

and i don't konw how to continue


Claude Tardif lui répond.
Solving an equation 2000-11-14
Heather pose la question :
4x-3 = 3x+4 these kinds of problems i dont get but everything else in my math class i have got. i just dont understand it.
Penny Nom lui répond.
Square roots 2000-10-29
Pamela pose la question :
HERE GOES(I WILL USE Q AS THE SYMBOL FOR SQUARE ROOT):

8(Q2) - 5(Q2) + Q2

SECOND PROBELM IS

(1 + Q2)2

LAST ONE

3/(2-Q5)


Claude Tardif lui répond.
Mr. Edgecomb's math exam 2000-09-17
Rachel pose la question :
In Mr. Edgecomb's math class, 30 students took an exam on statistics. If the average passing grade was 84, the average failing grade was 60, and the overall average was 80, how many students passed the test?
Penny Nom lui répond.
Trinomial 2000-09-06
Lea pose la question :
I need to find the trinomial value of k which makes a perfect square. The problem is x2 - 6x + k
Penny Nom lui répond.
A equation with a square root 2000-09-03
Lea pose la question :
Please help with 2 plus the square root ( and under it has x plus 1) = 6
Thank you

Penny Nom lui répond.
Subtracting fractions 2000-08-26
Sarah Stanczyk pose la question :
how is this problem solved??

3/ x+1 - 5/x
( 3 divided by x +1 subtracted by 5 divided by x)


Penny Nom lui répond.
Two linear systems 2000-08-01
A student pose la question :
please help me with this homework question. 5/x + 6/y= 19/6 3/x + 4/y =2
hint: let a = 1/x and b = 1/y substitute these expressions into the system to find a and b. Then find x and y.

This is a question I answered wrong on a test: solve the given system for x, y, and z. Express your solutions in terms of a, b, and c.


Penny Nom lui répond.
LOG(LN(x)) = 1 2000-07-28
An algebra student pose la question :
LET F(x)=LOG X AND G(x)= LN X. SOLVE (f *G)(x)= 1
SHOW COMPOSITION AND USE DEFINITION OF LOGS.

Harley Weston lui répond.
Completing a square 2000-07-10
Lexa Michaels pose la question :
How do you complete a square? the textbook question is: x 4 + 64
Penny Nom lui répond.
Simplify 21+2[3z+5(3z+8)] 2000-07-02
Dennis Dyer pose la question :
My daughter has a math problem that I can't help her with. The problem is 21+2[3z+5(3z+8)] I can get the answer 101 +36z but I can't show her the correct way to write it out. Would you please show the correct way to show her work...
Penny Nom lui répond.
Simplifing 2000-06-15
Angie Herbert pose la question :
My daughter is having problems with her algebra homework. She is a year 7 pupil at high school in the UK. She has been given homework on simplifying formulae and she doesn't understand how to do them. Here is an example of one of the questions :

9s+7t+5c+5s-3t

can you help her to understand how to do these and perhaps me too.
Penny Nom and Claude Tardif lui répond.

Rectangles and algebra 2000-06-13
Kirstin pose la question :
A rectangle's length is 4 more than twice its width. The area of the rectangle is 336m squared. What is its length?
Paul Betts and Penny Nom lui répond.
Two problems 2000-06-12
Sharon pose la question :
If f(4)=0 and f(6)=6, which of the following could represent f (x)?

A. 2/3x-4 B. x+2 C. x-4 D. 3/2x+6 E. 3x-12

these are problems to study for a test so I need to know the answer and how it was solved!

I have one more question

If 180o < theta < 270o and tan theta = 4/3, then sin theta =?

A. 5/4 B. -4/5 C. 3/5 D. 12/5 E. -3/5


Harley Weston lui répond.
A conic in standard form 2000-05-18
Tara McConkey pose la question :
Im havign trouble converting the following conic to standard form, i know that the conic is a hyperbola but that is all 16x2-9y2-160x-18y+247=0
Harley Weston lui répond.
Subtracting polynomials 2000-05-13
Teresa pose la question :
I am suppose to subtract the lower polynomial from the one above it.
-3a+11b+2f
-3a- 6b+8f
________________

Penny Nom lui répond.
4x - [2x -(3x - 2)] = 13 2000-05-13
Teresa pose la question :
I need to find the following equation.
4x - [2x -(3x - 2)] = 13

Penny Nom lui répond.
Trig functions 2000-05-09
Melissa pose la question :
Find all solutions in the interval (0,2pi)
2cos2x-3cosx-4=0

Paul Betts and Harley Weston lui répond.
Uniting algebra and geometry 2000-04-16
Beth pose la question :
Who is the mathmatician that united algebra and geometry???
Claude Tardif lui répond.
Finding a Quadratic Equation given the roots 2000-04-16
A secondary student pose la question :
How do I find the equation for the quadratic with roots at 2-i and its complex conjugate?
Harley Weston lui répond.
Increasing the weight 2000-03-23
Lee Millard pose la question :
A weight of dimension a, b is to have its weight increased by w% by bolting plates of the same material along the top and one side (but not at both ends). The top plate and side plate have the thickness, x. Find the thickness of the plates for a given weight increase of w%.
Penny Nom lui répond.
A system of equations in five unknowns 2000-03-20
Will pose la question :
I have been having some problem with the following question for some time. I would appreciate any help on solving the problem or a solution.

Q: Assume that a system of equations in the unknowns x1, x2, x3, x4 and x5 when converted to row echelon form gives

.
.
.

Penny Nom lui répond.
Simultaneous equations 2000-03-11
Laura Molck pose la question :
My name is Laura Molck and I am in Year 11 in Australia. Please help me with the following. I know that they are all simultaneous equations which I can do but I have trouble with the formulae to work the equations. Can you please help!!

1. A tent manufacturer produces 2 models, Outback and Bushwalker. From earlier sales records it is known that 20% more of the Outback model is sold than the Bushwalker. A profit of $200 is made on each Outback sold, but $350 is made on each Bushwalker. If during the next year a profit of $177,000 is planned how many of each model must be sold?


Penny Nom lui répond.
Some equations 2000-03-08
Maria pose la question :
Hi, could you help me with these questions:

Find x & solve

  • 7-2x/3=9
  • 4x+3/5=-2
  • 6-2x=14
  • -1/7x=-4/3+1/6

Penny Nom lui répond.
Fractions in algebra 2000-02-27
Leslie pose la question :
Question:
add (4x+1)/(x-8) + (3x+2)/(x+4) + (49x+4)/(x^2-4x-32) and

solve x - 6/(x-3) = 2x(x-3)

Penny Nom lui répond.
Irrational algebraic functions 2000-02-21
Bucky Cadena pose la question :
Here is the multipart problem:

Given f(x) = x-3* squareroot of x + 4

What does the f(x) intercept equal Find the two values for which f(x) = -5 Find the one value for which f(x) = -3


Harley Weston lui répond.
Can't make an equation! 2000-01-30
Maggie Clarke pose la question :
An estate is to be distributed among the wife, 3 children and 2 grandchildren. The children will each receive 2x as much as each grandchild, and the wife will receive 4x as much as each child. If the estate amounted to $115,000, how much will each person receive?
Penny Nom lui répond.
Quadratics 2000-01-27
Lori pose la question :

Hi my name is Lori. I'm a student, in the 11th grade.I have a problem in quadratic functions. I don't know how to get the numbers into the problem and then how to do the problem. here is one problem the rest are sort of similar to it... y=2x squared. If I were to find out how to get the (x,y) answers then I could graph it but as I said I can't find the numbers to go into the problem.

Also in the equation g: x arrow to y = -x + 4..... how would you know weather it is or isn't a quadratic equation????


Penny Nom lui répond.
Quadratic 2000-01-26
Karen Johnson pose la question :
What is the reasoning behind the title quadratic equation?
Penny Nom lui répond.
Complex Roots 2000-01-24
Jess Rutherford pose la question :
How do I find the value of k when 5x2 + k = 3x and has complex roots ?
Penny Nom lui répond.
Word problem 2000-01-24
April pose la question :

Ok, my algerbra teacher gave me this problem and by just looking at it I can tell what the answer is but he wants me to show how I got the answer in an equation form.

The tempature at 7am on a cold day was -4 degrees Celcius. At 3pm the tempature was 1 degree Celcius. Write and solve an equation to find out how many degrees the tempature rose between 7am and and 3pm.


Penny Nom lui répond.
Domain of a function 2000-01-19
Stacey Hutchison pose la question :

What is the domain of:

f(x) = -1/(x + 4)


Patrick Maidorn lui répond.
Algebra 2000-01-18
Candis pose la question :
I want to know what exactly is Algebra?
Not how to do it, or methods. Just what is it?

Allen Herman lui répond.
Ax + By = C 2000-01-18
Fatiha Khanboubi pose la question :
I was wondering if you could please explain to me how I would write the equation of line through the given points [(4,1), (6,3)] in Ax+By=C form.
Harley Weston lui répond.
Solving an equation 2000-01-17
Shelley's Mom pose la question :

My daughter has an assignment in math that includes this equation:

-6b+5= -10

I've tried to help her with a scale. We've figured that you subtract 5 from each equation so its not -6b = -15. Is this correct and can you help us figure out the next step?


Penny Nom lui répond.
Algebra 2000-01-13
Tim Merrill pose la question :
"please help me out with these four algebra questions"

  1. Rewrite the following using positive exponents only.

    xy -3
    -------
    x -2

  2. Find the following quotients.

    9a3+3a2+6a
    --------------
    3a


.
.
.

Penny Nom lui répond.
Parallel lines 2000-01-12
Lori pose la question :
Find an equation of the line parallel to the given line containing the given point. x + y = 2; (1,2) We know parallel line have the same slope and we know the answer y = -x + 3.
Penny Nom lui répond.
Three algebra problems 1999-12-28
Stephanie Branton pose la question :
  1. If P represents the product of all prime numbers less than 1000, what is the value of the unit's digit of P?

  2. Do any real numbers a and b exist such that: ln(a+b)=ln a + ln b? if so, what are they?

  3. Define a function by: f(x)=1/1-x where x is not equal to 0,1. what is f(f(f(a)))?

Harley Weston lui répond.
Two algebra problems 1999-12-17
Michael Standfest pose la question :
If x+4 is a factor of 2x4+kx3-3kx2+6x-40, find k

and

Prove that n2-n is even for all n, using the proof of contradiction
Penny Nom lui répond.

Solve for v 1999-12-09
Beth pose la question :
1-3/4(v+2)=-5
Penny Nom lui répond.
Two conics 1999-12-07
Quinn pose la question :
I know the formula to find the axis of symmetry of a conic section (I'm not sure what shape - circle for the first one??) is (-D/2A,-E/2C) but I obviously don't get how to calculate it, because when I check the answer it's wrong, but I'm so close!! For the following equations my teacher suggested to "divide the x term coefficient, D, by the x squared term coefficient before...do the same for y."

2x2+2y2-8x+12y+16=0
.
.
.
Penny Nom lui répond.

The sixth game 1999-11-16
Stephanie Sprunger pose la question :
Janice scored 18,21,27,16,and 19 points in five basketball games. How many points must she score in the next game to raise her average to 22 points per game?
Penny Nom lui répond.
Multiple step problems 1999-11-09
Maria Rainsdon pose la question :
I don't understand how to solve these multiple step problems. I wasn't there when my teacher explained it and I am really lost. Here is one of the probs I don't understand: 3m+6=-m-6.
Penny Nom lui répond.
Transforming a triangle 1999-11-02
Wilder Maldonado pose la question :
The height, H, of a triangle is increased by a lenth M, How much must be subtracted from the corresponding base,b, so that the area of the new triangle is one-half that of the original triangle.
Penny Nom lui répond.
Equations with fractions 1999-10-10
Lori pose la question :
I'm a secondary student. How would you figure out a problem such as t-2/t =14/3t - 1/3. The book gave one example but it is really easy. The work YOU have to do is totally different. You don't have to tell me the answer just how to do such problems like these.
Penny Nom lui répond.
Common factors 1999-10-06
Tommygirl98 pose la question :
Ok I have a question about common factoring I'm not to sure if you could help me but it's worth a try here it goes. Ok I have a test on Friday and i'm having trouble understanding how to do it here's an example,

Factor,
-10 + 2b how do you do it and what do they mean by factor?
Penny Nom lui répond.

-8*-(-5a)=15 1999-09-22
Shelby pose la question :
-8*-(-5a)=15

i cannot get this question!! please help me!!
Harley Weston lui répond.

Bob and his dad 1999-09-14
Yvette pose la question :
"Bobs dad is 27 yrs older then Bob. The sum of their ages 5 yrs ago was 45 yrs. How old is Bob now?"
Penny Nom lui répond.
The sum of the cubes is the square of the sum 1999-08-25
Bernard Yuen pose la question :
How to prove 13 + 23 + 33 + 43 + ... n3 is equal to (1+2+3+...n)2? (for n is positive integer)
Harley Weston lui répond.
The three cousins 1999-06-01
Irena pose la question :
I have three cousins on my dad's side. The product of their ages is 84. Next year the youngest will be 1/4 the age of the middle cousin. In 2 years from now, the oldest will be twice the current age of the middle. What is the age of my oldest cousin?
Harley Weston lui répond.
A problem with powers 1999-06-01
Bill pose la question :
solve for the variable:

5-x = 25x+6
Penny Nom lui répond.

Graphing a linear equation 1999-05-27
Dylan Bradley pose la question :
Im in Grade ten and am doing linear equations, I cann't figure out how to make a chart for questions like y = -2x + 3
Penny Nom lui répond.
Introductory Algebra 1999-05-19
Pat pose la question :
(2 + sq. root of 3) x (2 - sq. root of 3) = 1

Please show me the work.
Harley Weston lui répond.

A 1999-05-02
Leah pose la question :
a=b
a^2=ab
a^2+b^2=ab-b^2
(a-b)(a+b)=b(a-b)
a+b=b
b
2=1

why is this proof wrong?
Penny Nom lui répond.

y=mx+b 1999-04-15
Selena Royle pose la question :
When solving a problem on slopes,and in the formula y=mx+b what do the M and B stand for? Why M and B?
Penny Nom lui répond.
Extra point questions 1999-04-15
W Troy Council pose la question :
My teacher has given me 5 extra point questions. I have figured out two, but i need a little assistance with 3 others, could you help me with:
  1. A stablehand agreed to work for 1 year. At the end of that time, she was to receive $240 and one horse. After 7 months she quit the job, but still received the horse and $100. What was the value of the horse?

  2. If the roots of x2 + bx + c are pi and square root 2, then find "b" and "c."

  3. ...

Penny Nom lui répond.
Grade 10 math 1999-04-08
Ron pose la question :
the type of question i'm having trouble with is 5(2x-1)=3(x-4)
Penny Nom lui répond.
Factoring 1999-03-08
L. Sivad pose la question :
Question:
m2+6m+9-n2

Penny Nom lui répond.
An airplane problem 1999-03-08
B.M.R. pose la question :
A plane left New York and headed East to its destination 3600 miles away across the Atlantic. On the way back its speed was boosted by a 50 mph tail wind and it arrived an hour early. What was its normal speed?
Jack LeSage lui répond.
Enlarging a Rink 1999-03-06
Jennifer Rudd pose la question :
I've been having difficulty with this one question involving area. The level of the question is Grade 11/12. Here it is!
A rink is 40 m long by 20 m wide. There are plans to enlarge it by 700m2 by adding a strip at one end and a strip of the same width along one side. Find the width of the strip. (Let the width of the strip by x meters.)

Jack LeSage lui répond.
Algebra 1998-11-25
Casey pose la question :
yeah my son brought home a math worksheet and he was wondering and me too if u could help him and me out . he has problems like this 4n+9=7n+2= ??? and he has to show work so if u could help us out that would be great
Jack LeSage lui répond.
Adding Fractions 1998-10-03
Pam Bailey pose la question :
Can you help me simplfy this?

(1/2a + 1/3b) - (1/4a - 1/5b) + (1/6a - 1/7)

thanx
Harley Weston lui répond.

Grade 9 Algebra 1998-06-07
Tarah Kostenko pose la question :
I am a grade 9 student and I cannot figure out how to solve these two similar problems. can you please help?
-3(y-1/2)=1/2 also -2/3(x + 1)=6
I don't come up with the same answers as the book and I can't figure out what I'm doing wrong.

Thank you,

Harley Weston lui répond.

 
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