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 A pond in a garden 2020-04-09 Jin pose la question :c) I have a large square pond set inside a square garden: both the pond and the garden have sides which are a whole number of metres, and outside the pond, the garden is grassed over. The area covered by grass is 188 square metres. Find the area of the pond. (5 marks)Penny Nom lui répond. An arithmetic sequence 2020-04-04 ally pose la question :-10 ... last term 35 common difference is 3 (a) find the number of term in the sequence. i have lost the formula.Penny Nom lui répond. The difference between two number is 7 2020-01-07 Jaypercey pose la question :the difference between two number is 7 find the two number if the larger 3times the smallerPenny Nom lui répond. An arithmetic sequence 2019-02-23 Dalal pose la question :If x+1 and -x+17 are the second and sixth term of a sequence with a common difference of 5, what's the value of x.Penny Nom lui répond. An arithmetic sequence 2019-01-31 sara pose la question :if the 6th term of an arithmetic sequence is 8 and the 11th term is -2, what is the first term?Penny Nom lui répond. The sum and difference of two numbers 2018-08-30 Saranya pose la question :Hi, The question is to find the numbers from sum and difference. The Sum = 14 and the difference = 2 I found in this web site some useful answers. but my kid is going second grade only. She don't know how to do a division or multiplication. So can you please explain on how to find the answer using only the Addition and Subtraction. Thanks in advance.Penny Nom lui répond. The difference between two numbers is -3 2018-06-05 Hannah pose la question :write a pair if integers whose difference is -3 ( given that the greater number is 8 )Penny Nom lui répond. Pre tax and post tax percentages 2018-05-22 Tom pose la question :Hi, I work in a clothes shop which can also do mail-orders. My Head Office has sent a report with which we can check the records we keep in store tally with those at HO. According to that report we have taken £2578.25 in orders, excluding VAT (20%), which would therefore be £3093.91 including VAT (2578.25+20%=3093.91). According to my records, we have taken £3179.32 including VAT, which would be £2543.45 excluding VAT (3179.32-20%=2543.45). Why is it that the difference between the VAT inclusive figures (3179.32-3093.91) is +£85.41, but the difference between the VAT exclusive figures (2543.45-2578.26) is -£34.81? Now, I can see from the report that 1 order has not been recorded by HO, and I know that our average order value is around £30, so the -£34.81 makes sense. But surely both figures should be a minus, regardless of whether they include VAT? I'm sure there is an obvious answer, but I just cannot see it! Any help would be gratefully received. Thanks, TomPenny Nom lui répond. The sum and difference of two numbers 2018-03-13 samima pose la question :Two numbers have a difference of 0.85 and the sum 1.What are the numbers?Penny Nom lui répond. Expand (5x-9)(5x+9) 2018-03-01 adil pose la question :expand the following: (5x-9)(5x+9)Penny Nom lui répond. The sum and difference of two numbers 2018-01-25 Ali pose la question :Hello, I was looking at the original question that was posted and answered by your team: http://mathcentral.uregina.ca/QQ/database/QQ.09.07/s/donna1.html I used the 7 and 4 as example and not looking for 39 per original question: A=7 B=4 7+ 4 =11 and 7-4 = 3 We end up with 11 +3 = 14 A= 14/2 give use 7 B = how do you solve for B or 4 with out knowing anything about 3 or any other numbers ? Thank you AliPenny Nom lui répond. An arithmetic sequence 2017-11-30 yo pose la question :x; 2x+1; 11 are three consecutive terms of an arithmetic sequence.calculate xPenny Nom lui répond. An arithmetic sequence 2017-07-17 abbi pose la question :hi there im a student in 11 grade ive been trying to do this task but i have no idea how to do it the question is Find the common difference and the n^th term of the arithmetic sequence if the first term is 4 and the twentieth sum of the terms is 1030Penny Nom lui répond. Successive Differences 2017-04-06 Twaha pose la question :Please find the equation of the sequence 1 2 4 7 11 16 22Penny Nom lui répond. The sum and difference of two numbers 2017-03-20 Olivia pose la question :The sum of two numbers is 87 and their difference is 29. What are the two numbersPenny 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. A pattern rule for a sequence 2016-10-28 Grace pose la question :Here's a Grade 7 question, we need to find the pattern rule: 1 - 1 2 - 3 3 - 6 4 - 10 ...... It may involve exponents, but we can't seem to figure it out. thank you. Grace.Penny Nom lui répond. A sequence 2016-01-05 Mia pose la question :the next three terms in each sequence. 0.4, 0.54, 0.68, 0.82,Penny Nom lui répond. 2^48 - 1 2015-06-13 Soham pose la question :The number 2^48-1 is divisible by two numbers between 60 and 70. The sum of the two numbers is?Penny Nom lui répond. A limit 2015-02-19 genc pose la question :Lim (27x^3-1) / (3x-1) X-> 1/3Harley Weston lui répond. A difference quotient 2015-01-12 Sasha pose la question :Simplify the difference quotient f(x) − f(a)/ x-a if x ≠ a. f(x) = x^3 − 12Penny Nom lui répond. (x-3)^2-(x+3)^2 2014-11-13 Bernice pose la question :(x-3)^2-(x+3)^2Penny Nom lui répond. An arithmetic sequence 2014-03-20 Xabiso pose la question :The 10th term of an arithmetic sequence is 28 and the 7th term is 19. Calculate the common difference and the first term of the sequence.Penny Nom lui répond. Can 100r^2-81z^2 be factored? 2013-12-08 Rosa pose la question :Can 100r^2-81z^2 be factored?Penny Nom lui répond. An Arithmetic Progression 2013-10-08 collins pose la question :In an A.P. the difference between the 8th and 4th term is 20 and the 8th is one and half times the 4th term... what is the common difference and the first termPenny Nom lui répond. Constructing a triangle 2013-08-22 Nazrul pose la question :The base, the difference of the angles adjoining the base and the sum of the other two sides are given. How can I draw the triangle? Please help me.Chris Fisher lui répond. a cube-b cube-a+b= ? 2013-06-16 saryu pose la question :a cube-b cube-a+b= ? find the answerPenny Nom lui répond. Two numbers whose difference is 16 2013-06-08 Johan pose la question :Two numbers whose difference is 16 and whose sum is 120Penny Nom lui répond. (4- 4cos^4 x)/(sin^2 x) 2013-05-18 Agnes pose la question :How I can solve this question : Simplify (4- 4cos^4 x)/(sin^2 x) and write in terms of sin xPenny 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)]/hPenny Nom lui répond. Difference of squares 2012-11-19 Qelibar pose la question :Please factorise x^2y^2 - 4Penny Nom lui répond. The difference of the numbers on two dice 2012-08-19 dilys pose la question :Two fair dice are thrown. Find the probability that the difference of the two numbers is divisible by 4?Chris Fisher and Lorraine Dame lui répond. Two equations involving fractions 2012-06-12 Fatima pose la question :Hi ,teacher gave two question to my daughter as follows Solve 2/x+3=(1/xx-9)-(1/x-3)and Solve (4/x-2)-(x/x+2)=16/xx-4 Please help me Thanks & regards fatimaPenny Nom lui répond. The difference in latitudes of two cities 2012-01-18 Renee pose la question :Assuming that the earth is a sphere of radius 6378 kilometers, what is the difference in latitudes of two cities, one of which is 600 kilometers due north of the other?Robert Dawson lui répond. Sum and difference of squares 2011-12-31 Anne pose la question :Se x e y são números reais distintos, então: 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. U(n+1) = 2Un + 1 2011-05-22 Cillian pose la question :In a certain sequence, to get from one term to the other you multiply by 2 and add 1, i.e. This is a difference equation of form: U(n+1) = 2Un + 1. prove that there is a maximum of 2 perfect squares in this sequenceClaude Tardif lui répond. Find two numbers whose difference is 153. 2011-05-10 Scott pose la question :Find two numbers whose difference is 153.Penny Nom lui répond. (3x+4y)^2 - (2x-y)^2 2011-03-16 Taiwo pose la question :pls could some one help me with this question? thanks as lot factorize: (3x+4y)^2 - (2x-y)^2Penny Nom lui répond. Difference quotient 2010-07-26 Brandon pose la question :i'm trying to figure out how to use the difference quotient with x^3, i have tried the following...(x+h)^2*(x+h)-(x+h)/h and i have only gotten as far as...(x^2+2xh+h^2)-(x+h)/h....i cannot see where i am goin astray, i know i am overlooking something simple, what am i overlooking?Penny Nom lui répond. Difference of cubes 2010-05-22 Anad pose la question :how can we prove a^3 - b^3 is equal to (a-b)(a^2+ab+b^2)?Penny Nom lui répond. (9 - x^2)/(x - 3) 2009-12-04 Sandy pose la question :9-x^2/x-3 I need to know how to solve this. ThanksPenny Nom lui répond. Successive differences 2009-06-18 Jonathan pose la question :I'm trying to find the next number sequence for this equation: 1 11 35 79 149 251, my problem is that I worked it out and ended up with a single number 17. What am I doing wrong. Thank you for any help.Robert Dawson and Penny Nom lui répond. A difference quotient 2009-06-17 Sue pose la question :When s(x)=x^3+x, compute and simplify the difference quotient s(x+h)-s(x)/h.Harley Weston lui répond. Actual Food Cost is 3% or more above Projected Food Cost 2009-04-07 Kam pose la question :Your store guidelines states that when Actual Food Cost is 3% or more above Projected Food Cost, immediate corrective action be taken by the Unit Manager. In January, your Actual Food Cost was \$11,000, and your Projected Food Cost was \$10,850. To find out what percentage the difference is do I divide the difference (\$150) by Actual Food Cost (\$11,000) or Projected Food Cost (\$10,8500)? What would be the answer? ThanksHarley Weston lui répond. Percentage difference in pipe volumes 2009-02-22 mike pose la question :what is the % difference between a 3 inch diameter pipe compared to a 4 inch diameter pipe? and how do i find the answer?Penny Nom lui répond. The difference quotient (f(x+h)-f(x))/h 2009-01-26 helen pose la question :Find the difference quotient of f, f(x+h)-f(x)/h, h does not equal 0, for this function. Be sure to simplify. that is, find f(x)=x^2-x+4Robert Dawson lui répond. Factor x^2 - y^2 2009-01-20 Shell pose la question :complete Factor: x^2-y^2Penny 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. Factoring 2008-11-19 Neji pose la question :How do you factor (y-z) (y+z) (y^4+y^2z^2+z^4) and get (y+z)(y^2-yz+z^2) (y-z) (y^2+yz+z^2) as the answer?Harley Weston lui répond. z(z+1)-x(x+1) / z-x 2008-09-30 sylvia pose la question :z(z+1)-x(x+1) / z-x HOW DO I SIMPLIFY THISPenny Nom lui répond. a(a+1) - b(b+1) 2008-09-30 Shaun pose la question :I need to factor (a-b) out of the following: a(a+1) - b(b+1). I know it is simple but I cannot remember how.Penny Nom lui répond. 3,6,10,15,and 21 2008-09-28 jarred pose la question :i am currently stumped on a math project that requires me to find out the recursive formula for a sequence of numbers. the numbers in the sequence are 3,6,10,15,and 21. Thank you for your time.Walter Whiteley lui répond. A cubic equation 2008-08-25 RAM pose la question :The following Cubic Eqn should have three roots - what are they? x^3-27=0Penny Nom lui répond. Simplifying Algebraic Expressions 2008-08-22 Jacky pose la question :x^2-y^2+4x+4yPenny Nom lui répond. Factoring x^2 + 729 2008-08-19 peter pose la question :hello I,am having trouble factorising a polynomial into polynomial factors with real coefficients please can you help the polynomial is x^2+729Harley Weston lui répond. [f(x)-f(1)]/(x-1) 2008-08-14 katie pose la question :Evaluate (if possible) the function of the given value of the independent variable: f(x)=(x^3)-x: [f(x)-f(1)]/(x-1)Penny Nom lui répond. Percent difference 2008-08-12 mike pose la question :What is the percent difference between two homes if one is worth \$525,000 and the other is \$425,000. (525,000 - 425,000 = 100,000)Penny Nom lui répond. A difference quotient 2008-07-10 Rita pose la question :Find the difference quotient of f, that is, find [f (x + h) - f (x)]/h, where h does not = 0 for the given function. Be sure to simplify. f(x) = 1/(x + 3)Janice Cotcher lui répond. Percent difference? 2008-06-14 Cathy pose la question :I am trying to verify a "percent of difference" as stated on a tax form. I cannot seem to come up with the equation to do so. Here are a few examples on the form: Last year \$62.91 this year \$66.05 tax difference \$3.14 percent difference -5.64% Last year \$ 2014.97 this year \$1982.93 tax difference \$-32.04 percent difference 57.56% Last year \$97.66 this year \$79.58 tax difference \$-18.08 percent difference 32.48% I have tried several different ways and per some of Q&A's already on your site I still have a problem and would appreciate some assistance. Thanks-CathyPenny Nom lui répond. Percentage difference 2008-05-20 Cavell pose la question :Hi, the projected cost was 71,700. The actual cost was 56,876. What is the percent difference?Penny Nom lui répond. 5x^2 - 45 2008-02-11 Tiana pose la question :factor: 5x^2 - 45Stephen 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. Percentage of what? 2008-01-23 Jenny pose la question :What is the difference in percentage between 31990 and 29990?Stephen La Rocque lui répond. Explaining the factoring for the difference of cubes 2008-01-16 Bill pose la question :A student asked me where did the "difference of cubes" and "sum of cubes" come from. I did not have an answer for her. She is very bright and understands how they work but wanted to know where they derived from. Any help you can offer would be great. ThanksStephen La Rocque lui répond. Expand (a^4 - b^4) 2007-11-17 Saif pose la question :how would you expand (a^4 - b^4) ???Stephen La Rocque and Victoria West lui répond. The nth term 2007-10-18 shannon pose la question :Ok , what i am having problems with is the nth term. I get how the numbers come together, but i am having trouble with finding the nth term.Penny Nom lui répond. The percentage difference between 1/20 to 1/15 2007-10-11 jake pose la question :what is the percentage difference between 1/20 to 1/15....Stephen La Rocque lui répond. Sum and difference of two mystery numbers 2007-10-04 Donna pose la question :The sum of two numbers is 39. The difference is 11. What are the numbers?Stephen La Rocque lui répond. Percentage differences 2007-08-29 Camilla pose la question :If a store sells a certain syle of skirt, an in the first week they sell 13, in the second week 20, in the third week 17 and in the fourth week 23, calculate the percentage difference between the highest and the lowest weekly sale.Stephen La Rocque and Harley Weston lui répond. Percentage difference between a microcentury and 50 minutes 2007-08-21 Wonder pose la question :A lecture period (50 min) is close to 1 microcentury. Find the percentage difference from the approximation?Stephen La Rocque lui répond. Percentage change 2007-08-13 Karen pose la question :I need a formula for calculating percentages in Excel. For example, we = sold 4 units of an item one month, and 105 units the next. I need a = formula to calculate the percentage increase in sales units. Also, if = 5251 were sold one month and 651 the next, what is the formula for = calculating the percentage difference? Please help, thank you.Penny Nom lui répond. Simplifying an algebraic fraction expression 2007-07-25 Jessica pose la question :How do I simplify b/(b2-25) + 5/(b+5) - 6/b?Stephen La Rocque lui répond. A statistical difference 2007-07-03 a student pose la question :I am writing a paper for a grad class in which I am comparing achievement levels of boys and girls. I have data that shows the average marks for girls and boys in each grade 12 subject for the entire province. My prof want me to show there is a statistical difference. What do I have to do to show this? I don't have access to the raw data, so don't know the SD. Is there anything I can do mathematically with the data that I have? (I can determine n for each set of data, it ranges between 2400 and about 13000 for each subject area.)Chris Fisher and Harley Weston lui répond. Simplifying complex denominators 2007-06-21 Krys pose la question :How do I simplify completely? ((4+i ) / (3+i )) - ((2-i ) / (5-i ))Stephen La Rocque lui répond. What is the 100th term? 2007-06-15 George pose la question :I have the sequence 50,120,235,406,644 the 1st difference is 70,115,171,238 the 2nd difference is 45,56,67 the 3rd difference is 11,11 i used the a*n^3+b*n^2+c*n+d rule but the a turns out to be a decimal because 11/6 is 1.833333333 and so i cant find the formula for the 100th term term.Penny Nom lui répond. The difference between two dice 2007-06-02 smiley pose la question :Two standards dice are rolled. Determine the probability that the difference between the two numbers on the dice is 2Penny Nom lui répond. Percent difference 2007-05-17 Carolyn pose la question :What is the % difference between these two numbers 211373 & 185420Gabriel Potter, Penny Nom and Steve La Rocque lui répond. Using the "difference of squares" formula how do I compute 27 * 33? 2007-04-02 Sarah pose la question :Using the "difference of squares" formula how do I compute 27 * 33?Penny Nom lui répond. The percentage difference between 64.24% and 74.24% 2007-03-03 M pose la question :What is the percentage difference between 64.24% and 74.24%?Stephen La Rocque and Penny Nom lui répond. Factoring polynomials 2007-02-14 Joe pose la question :I am in the eighth grade, and we are learning the equivalent of Algebra 2. I have no ides how to factor (x-2)(x^2-1)-6x-6 You help is most aprreciated. Thank you! JoeStephen La Rocque lui répond. Find the next 3 terms of the sequence 2007-02-07 rose pose la question :find the next 3 terms of the sequence 2,3,9,23,48,87Penny Nom lui répond. Factoring m^4-9^n 2006-12-07 Josh pose la question :I can not figure out how to completely factor m^4-9^n.Penny Nom lui répond. (a^(1/3) – b^(1/3)) ( a^(2/3) + a^(1/3)b^(1/3) + b^(2/3)) 2006-10-24 Julie pose la question :(a1/3 – b1/3) ( a2/3 + a1/3b1/3 + b2/3)Haley Ess lui répond. Percentage differences 2006-10-23 Michael pose la question :how do I calculate the percentage difference of a certain box size. for example. How much percent smaller is this box: 8.4mm x 6.3mm to this box: 9.35mm x 7mmStephen La Rocque lui répond. Plotting percentage change 2006-10-11 Beckie pose la question :I have worked out a set of percentage differences which are all percentage decrease. Should i express them as a negative percentage as -20%? I also need to plot them on a graph and am not sure whether to just use the percentage difference as it is, in which case i get a positive gradient, or include a negative axis and plot them in this way, in which case i would get a negative gradient. I think the slope of the curve will be the same either way so it might not matter!Penny lui répond. Percentage Difference 2006-07-25 Sandra pose la question :I have two numbers (1530 and 1315). How do I calculate the percentage difference. For example: I have one loader that lifts 1530 lbs. and another loader that lifts 1315 lbs. I know the difference is 215 lbs. How much greater lift capacity does the loader that lifts 1530 lbs. have than the loader that lifts 1315 lbs.? The formula that I used was: 1530 - 1315 = 215 215/1315 = .163498 or 16.3% Is this correct? Stephen La Rocque lui répond. Factor 2006-03-08 Brad pose la question :Factor: x3 + 64m3 and 125p3 - q6Penny Nom lui répond. 3x^4 - 81 2006-01-02 Julio pose la question :How can I factor the following?: 3x4 - 81Penny Nom lui répond. A sum of 75 and a difference of 13 2005-10-30 Vicki pose la question :Find two numbers that have a difference of 13 AND A SUM OF 75? We need to learn about the formula or procedure.Penny Nom lui répond. 12-42, 8-26, 10-34, 9-30, 16-58 2005-08-31 Elizabeth pose la question :here is a math question my niece gave me, grade 7 12-42, 8-26, 10-34, 9-30, 16-58 first day of school and this is what they give her no explanationHarley Weston lui répond. Difference in latitude 2005-04-05 Gretel pose la question :Assuming the the earth is a sphere of radius 6378 kilometers, what is the difference in latitude of two cities, one of which is 400 kilometers due north of the other? 500 kilometers?Penny Nom lui répond. The answer to a subtraction problem 2005-03-22 Libby pose la question :What is the name of a number that is the answer to a subtraction problem?Diane Hanson and Claude Tardif lui répond. "a" cubed minus "b" cubed 2004-12-02 Denise pose la question :"a"cubed minus "b"cubed equal (a-b) times ("a"squared plus "ab" plus "b"squared)? I know this is a formula, but why is it true?Penny lui répond. Factoring 2004-07-19 A student pose la question :Factor completely: 3x3 - 24y3 54x6 + 16y3 16xy - 4x - 4y - 1 0.09x2 - 0.16y2Penny Nom lui répond. 3x squared - 27 / x + 3 2004-05-04 Stef pose la question :3x squared - 27 / x + 3Penny Nom lui répond. Some factoring problems 2004-04-15 KJ pose la question : Factor these: x3+125 -----> (x+5)3 8x3-27 -----> (?) x2+36 -----> (x+6)2 x4-5x2+4 --> (?)Penny Nom lui répond. Percent difference 2004-04-10 A parent pose la question :For a school science project, my son Alex is taking measurements of plant growth at regular intervals. As part of the data, he must provide the maximum percent difference observed in the categories his team has identified. So, for example he has six plants with four measurements each. (He has more, but I'll keep it simple) For the first plant he measured 2mm, 2.4mm, 2.9mm, and 3.2mm. For the 2nd, 3rd, and 4th plants, he has similar numbers. Is there a way to calculate the maximum percent difference between any two plants in his measurements during the project? Doing it for each combination would be tedious.Penny Nom lui répond. Differences in percentages 2004-04-06 Jose pose la question : Question: You have two groups: Group A has 10 people and 2 are Chinese Group B has 12 people and 3 are Chinese In terms of percentages what is the difference in Chinese between the two groups? In other words which group has the biggest percentage of Chinese and why? Penny Nom lui répond. Percentage difference 2004-03-28 Someone pose la question :what is the percentage difference between 157 to 251 Penny Nom lui répond. Sums and differences 2004-02-10 David pose la question :The sum of two whole numbers is 63. The difference between the numbers is 10. Find all the possible pairs.Claude Tardif and 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. The 4th difference 2003-11-17 Jack pose la question :If i had a sequence which was the same at the 4th difference, aka difference to the 4th, like: 1 5 14 30 56 96 (sequence) 4 9 16 26 40 5 7 10 14 2 3 4 1 1 then what would be the set formulars to find out a, b, c, d, and e as i know the equation has to be an4+bn3+cn2+dn+ePenny Nom lui répond. Is 3/5 CLOSEST to 0, 1/2 or 1? 2003-07-09 A student pose la question :I would like to know is 3/5 CLOSEST to 0, 1/2 or 1. And can 3/10 go either way as to be closest to 0 or 1/2.Penny Nom lui répond. The sum of two numbers is 5 and their difference is 2003-06-16 Akhil pose la question :The sum of two numbers is 5 and their difference is 11. What is the product of the two numbers?Penny Nom lui répond. Finite differences 2003-02-10 Jenny pose la question :I need to find a formula that will work with any number. I am finding the volume of a 3d cross- shape. Here are my results so far: ```Term Number 0 1 2 3 4 5 nth term 1 7 25 63 129 231 1rst diff 6 18 38 66 102 2nd diff 12 20 28 36 3rd diff 8 8 8 ``` I can't seem to find a formula that will work with any number. Any help would be much appreciated. Penny Nom lui répond. Factoring 2002-12-11 Larry pose la question :Question: how do u factor trinonmials EX: X 3 + Y 3 X 3 - 8Y 3 8X 2 - 72 64A 3 - 125B 6 Penny Nom lui répond. Percentage 2002-07-20 Sally pose la question :If 20% of 100 is 80, then why is the percentage difference between 80 and 100 25%. Penny Nom lui répond. Percentage difference 2002-03-08 Tedd pose la question :Can you give me the formulas for calculating percentage differences between two numbers? For example: if the first number is 10 and the second number is 15, then the second number is 50% larger than the first number. However, the formula to calculate that percentage won't work if the first number is greater than the second number as in the following example: The first number is 15 and the second number is 10, with the second number being 33.3% less than the first number. Or maybe I'm mistaken and the same formula will work in both situations. Penny Nom lui répond. Successive differences 2002-01-20 Linsey pose la question :what is the rule for working out the formula for a sequence with three lines of difference? eg. ``` 1, 3, 7, 15, 29 1st line differences: 2, 4, 8, 14 2nd line differences: 2, 4, 6 3rd line differences: 2, 2 ```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. (7x2 – 3yz)2 – (7x2 + 3yz)2 Use Pascal’s triangle to expand (2x – y)4 8x3 y - x3 y4 (m + 3n)2 – 144 12x4 y – 16x3 y2 – 60x2 y3 p3 q2 – 9p3 + 27q2 – 243 Peny Nom lui répond. Finite differences 2001-10-08 Murray pose la question :My name is Murray and I am a 10th grade student. Me and my friend have recently discovered and proved a theorem of a relitively advanced nature. It is that the the nth difference of an nth degree equation = n! times the coefficient of the highest power. One of my teachers said this theorem is part finite and that she thinks she has seen it before, but she does not remember what it is called, at what level it is taught, who discovered it or when it was invented. I would greatly appretiate answers to any of these questions.Chris Fisher 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. Factoring (u-v)3+v-u 2000-12-15 A parent pose la question :I am a middle school teacher and a parent. I am snowed in and trying to help my 9th grader get ready for 9 weeks exams. I have tried to factor this problem to no avail. (u-v)^3+v-u. I have the answer but I need to know how it is done.Penny Nom lui répond. Factoring ^6 2000-01-03 Athena pose la question : my name is Athena and I have a question on factoring: how would you figure this out: (x6-y6) and (x6+y6) Penny Nom lui répond. The greatest possible difference 1999-09-17 Denea Hugunin pose la question :Use each of the digits 1 to 5 once to make a 2 digit number and a three digit number that the greatest possible difference.Penny Nom lui répond. A difference of squares problem. 1999-07-24 Michael and Stephanie Bixler pose la question :If you have the equation x= n2 - m2 (ie 40= 72-32= 49-9) x must = a positive number 1) which squared numbers work as n and m 2) how does it work 3) if my teacher gave me the number for x; how could I figure out this problemHarley Weston 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. Factoring 1999-03-30 Maggie Stephens pose la question :I don't know anything about factoring would you plese help me. 3x4 - 48 54x6 + 16y3 125-8x3 12x2 - 36x + 27 9 - 81x2 a3 + b3c3 I would greatly appreciate any help you can give me thanks. Jack LeSage lui répond. Factoring 1999-03-08 L. Sivad pose la question :Question: m2+6m+9-n2Penny Nom lui répond. Finding a rule for a sequence 1999-02-17 Lindsey Masters pose la question :I'm doing a maths investigation and i have a sequence which goes:- 13,16,25,32,45,56,73. Our teacher told us we have to find a rule by looking at the differences of the terms until we find a constant. The first differences are:- 3,9,7,13,11,17. The differences of these are:- ...... Please could you tell me how to work it out so that I could work out the rules of similar sequences. Penny Nom lui répond. What's the next term? 1998-11-12 Ilia pose la question :What the formula and explonation for formula for next patterns: 1) 1, 4, 10, 20, 35, 56, 84,... 2) 0, 6, 30, 90, 210, 420,... Thanks!Penny Nom lui répond. Difference of squares 1998-06-23 Kristen Smelsky pose la question :Solve the following using a difference of squares: 4x(squared) minus 4xy plus y(squared) minus m(squared) plus 2m minus 1 Penny Nom lui répond.

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