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Extraneous solutions |
2009-06-02 |
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Ayana pose la question :
solve and check for extraneous solutions.
3x+6/ x²-4 = x+1/ x-2
x can not = {-2,2}
Penny Nom lui répond. |
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Selecting 3 people from 4 |
2009-06-02 |
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muhammadibeaheem pose la question :
Use mathematical induction to prove that for all integers n≥1,
is divisible by 3.
Question 2;
A club consists of four members.How many sample points are in the sample space when three officers; president, secretary and treasurer, are to be chosen?
Penny Nom lui répond. |
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Stones around a pool |
2009-06-01 |
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Jessica pose la question :
I am putting a yard pond in and I am trying to find out how many stones I would need for the perimeter.
The pond is 4ft (W) by ft (L) by 1.5ft (D)
Thank You,
Jessica
Penny Nom lui répond. |
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Conditional probability |
2009-06-01 |
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Tanja pose la question :
A biased coin where P(heads) =3/5 is flipped 4 times. What is the probability of getting at least 3 heads given at least 1 heads is flipped?
I can calculate this using P(A|B) =P(AandB)/P(B) but I've had students asking me how you would work this question out the "long way"
without the formula. I'm am unsure about how you do this the long way.
Robert Dawson lui répond. |
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Two equations |
2009-05-31 |
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tony pose la question :
y = 1.2x - 32.7,
y = -0.7x + 46.15
can you please solve this for me? i am not able to figure it out... thank you
tony
Penny Nom lui répond. |
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how do I factor 45 - 5x^2 |
2009-05-31 |
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tracey pose la question :
how do I factor 45 - 5x^2
Penny Nom lui répond. |
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The dimensions of a rectangle |
2009-05-30 |
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Linda pose la question :
A rectangle has a perimeter of 38 feet & an area of 48 square feet. What are the dimensions of the rectangle?
Stephen La Rocque lui répond. |
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sin x/ 1+cos x = 1-cos x/ sin x |
2009-05-30 |
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rita pose la question :
prove: sin x/ 1+cos x = 1-cos x/ sin x
Stephen La Rocque lui répond. |
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How much more volume is needed to reach a certain % |
2009-05-29 |
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Chris pose la question :
I am trying to figure out how much more volume is needed to reach a certain %. For example if I sell 15,182 of unit X out of 43,241 total units. Then I know that unit X is 35.1% of units sold. However, I need to get unit X to be 46.3% of total units sold. I need to figure how many more units of X I need to sell to reach this %. Of course if I sell more units of X then this increases the denominator. Can you please help? Thank you for your time.
Penny Nom lui répond. |
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Draw a net for a rectangular prism? |
2009-05-29 |
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Mohamad pose la question :
Draw a net for a rectangular prism?
Last week when we were studying for our finals we came across a section about drawing nets I would really appreciate it if you gave me some help on it
Robert Dawson lui répond. |
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A border around a pool |
2009-05-29 |
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PATTY pose la question :
POOL RADIUS IS 13 FEET ON THE OUTER EDGE, I WANT TO MAKE AN 18 INCH OUTSIDE BORDER AROUND THE POOL. WHAT IS THE VOLUME AROUND THE POOL. (THIS IS GOING FROM A 13 FT. RADIUS TO A 14.5 RADISU.
Penny Nom lui répond. |
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Solve 18(C-3)=162 for C |
2009-05-29 |
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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. |
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4.6 quadrillion divided by 65,000,000 |
2009-05-28 |
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david pose la question :
4.6 quadrillion divided by 65,000,000
Penny Nom lui répond. |
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How many times does the graph of y=2xsquared -2x + 3 intersect the x-axis? |
2009-05-27 |
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Henry pose la question :
how many times does the graph of y=2xsquared -2x + 3 intersect the x-axis?
Penny Nom lui répond. |
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Two ships and a lighthouse |
2009-05-27 |
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Chelsey pose la question :
I have a question in regards to how do I know when to use tangent or cosine when determining angles. The question is: Looking north from the observation deck of a lighthouse 60 m above the sea, a lighthouse keeper sees two ships. The angles of depression to the ships is 5 degrees and 10 degrees. How far apart are the ships?
I don't understand which one to use when solving the equation.
Harley Weston lui répond. |
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