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A common tangent to two curves |
2009-03-02 |
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From Jay:
For what values of a and b will the parabola y = x^2 + ax + b be tangent to the curve y = x^3 at (1,1)?
Answered by Penny Nom. |
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The area of a 5-sided lot |
2009-03-02 |
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From Linda:
I have a problem I'm hoping you can provide some help with. When I check the property information for our home on our District of North Vancouver website, it shows that our property is supposed to be 1146.99 Square Metres. Yet another property which has identical measurements is listed as having 1173.7 Square Metres. I would like to figure out who is correct.
Answered by Harley Weston. |
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If 5 to the power of y = 625, what is y? |
2009-03-02 |
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From Charlene:
If 5 to the power of y = 625, what is y?
Answered by Penny Nom. |
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The sum is 43 and the difference is 9 |
2009-03-02 |
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From Teresa:
Hi, My 10yo son came home with this two problems and we can't figure out how to solve them.
1. Find two numbers whose sum is 43 and whose difference is 9 and
2. Find two numbers whose sum is 25 and whose difference is 11..
Many thanks
Teresa
Answered by Robert Dawson, Stephen La Rocque and Harley Weston. |
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Is ACB a right angle? |
2009-03-02 |
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From racheal:
how to i prove angle ACB is not a rt. angle when given AT=BT=5;CT=4 in a indirect proof?
Answered by Robert Dawson. |
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Symmetries of a polyhedron |
2009-03-02 |
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From Vincent:
I want to ask is there a formula to find out the number of axes of rotation & plane
of reflection of a 3D figure, like pentagon, pyramid?
Answered by Chris Fisher. |
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Comparing 2^3^4^5 ; 2^5^4^3 ; 5^4^3^2 etc. |
2009-03-01 |
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From JIM:
WHICH WOULD BE LARGEST USING THE NUMBERS 2,3,4,5 :
2^3^4^5 ; 2^5^4^3 ; 5^4^3^2 : ETC. OF ALL THE POSSIBLE
COMBINATIONS ? IS THERE A GENERAL FORMULA ? I AM
UNABLE TO FIND A COMPUTER THAT CAN HANDLE SUCH LARGE
CALCULATIONS . I ALSO DO NOT THINK IT IS AS STRAIGHT-
FORWARD AS FIRST APPEARS . THANK-YOU , JIM
Answered by Stephen La Rocque, Robert Dawson and Harley Weston. |
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Implicit differentiation |
2009-03-01 |
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From Emily:
determine the derivative y' at the point (1,0)
y= ln(x^2+y^2)
y'(1)= ??
Answered by Stephen La Rocque. |
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The game of 24 |
2009-03-01 |
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From Jeff:
My son in the 5th grade was given a problem for extra credit and could use parents help. He was given the numbers 21, 13, 9, 6 and asked to use each number only once by +, -, /, x the numbers in any order to obtain an answer of 24.
Answered by Harley Weston. |
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An octagonal landscaping frame |
2009-03-01 |
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From Richard:
Hi
I am trying to put landscape timbers down in octagon shape that measures 6
feet across and outside measures 360 degrees.. The timbers are 4 inches by 4
inches. I need to know at what angle to cut boards and at what length i need to
complete octagon.
Thanking you in advance for your kind assistance.
Richard :)
Answered by Harley Weston. |
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An array with 2 more rows than columns |
2009-02-28 |
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From Mario:
Write a division sentence modeled by an array that has 2 more rows than the number in each row.
Answered by Penny Nom. |
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An annuity |
2009-02-27 |
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From Jules:
R 20 000 is deposited in the bank,at the end of each year R 5 000
is withdrawn from it, the interest is 13 percent compounded monthly.
Calculate how many years that person will be able to use his/her money ?
Answered by Stephen La Rocque. |
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Simplify the square root of 125 x^2 |
2009-02-27 |
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From Ashley:
√125x²
How do you simplify this equation assuming that variables can represent any real number?
Answered by Robert Dawson. |
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Where do X, Y and Z go? |
2009-02-27 |
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From Aj:
A E F H I K L M N T V W
B C D G J O P Q R S U
where do X, Y and Z go?
Answered by Robert Dawson. |
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Three number combinations |
2009-02-27 |
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From mark:
How many three number combinations can I get using 1,2,3,4,5? I can use a number more than once.
Answered by Robert Dawson. |
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