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Trinomial Distribution |
2008-10-22 |
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From Darya:
show that (x^2-x+3)(2x^2-3x-9) = Ax^4+Bx^3+C where A,B and C are constants to be found.
Answered by Janice Cotcher. |
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A linear system |
2008-10-22 |
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From Tiffany:
solve:
x + y + z = 4
2x - 3y - z = 1
4x + y - 2z = 16
Answered by Penny Nom. |
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nth term |
2008-10-22 |
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From jen:
what is a nth term and how do i find the nth term of any sequence
Answered by Penny Nom. |
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Factor completely |
2008-10-22 |
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From Monica:
I have to factor the following two items completely, but I am lost. I've tried factoring by substitution and grouping but they don't seem to work:
1. 5(w-3z) -10(w-3z)=
2. ab-21+a3-b7=
Answered by Penny Nom. |
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Area of a triangle |
2008-10-22 |
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From Jia:
I need to find 3 ways of finding the area of a triangle. I've already had one method down which is b x h and divided by 2. What other 2 ways can i find the area of a triangle?
Answered by Chris Fisher. |
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The chairs on a ski lift |
2008-10-21 |
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From Travis:
If you are sitting on chair 33 of a ski lift, which is a loop.
Chairs are numbered consecutively, starting with 1.
Chair 97 passes you halfway up the ski slope.
How many chairs are on the lift?
Answered by Penny Nom. |
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The sum of the reciprocals |
2008-10-21 |
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From garry:
the sum of two different positive numbers is 75 while the product
of the same two numbers is 25. Fine the sum of the reciprocals of these
two numbers
Answered by Penny Nom. |
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Exponential form |
2008-10-21 |
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From layla:
how we wite 256 in exponential form
Answered by Harley Weston. |
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Markup |
2008-10-21 |
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From lisa:
A television cost Best Buy 400.00. They want to sell it at a price of 1500.00. What would the percent markup have to be for this to happen.
Answered by Penny Nom. |
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Is zero a number? |
2008-10-21 |
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From milan:
why people call 0 number?....0 is nothing. What is 1,2,3,4,5,6,7,8,9?than???this is not logic...thanks i dont know what else
number means quantinty,but 0 means nothing.Thanks Mialn
Answered by Harley Weston. |
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What number has 5 hundreds and 12 tens? |
2008-10-21 |
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From kellee:
What number has 5 hundreds and 12 tens?
I would say the number is 620. But, my daughter thinks that is wrong.
Answered by Harley Weston. |
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Scaling a logo |
2008-10-20 |
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From Carl:
Hello!
I hope that you can help me out here. I've been trying to figure this out for awhile now and can't come up with the answer logically.
I am a graphic designer by trade and need to figure out how large my client's logo should be.
The logo will need to be sized proportionally with the surface area of the page.
The logo will always be sized at 1.2938(w) x .75(h) on a letter size page (8.5 x 11).
My question is...
When you increase the size of the page (not always proportionally sized - dimensionally) how do figure out the NEW size of the logo.
I could have a page 20" x 40" or 30' x 4'... or ANY size really.
I believe I have the new surface area of the logo but can't find the new dimensions.
Answered by Harley Weston. |
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Melting ice on a hemisphere |
2008-10-20 |
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From heather:
The top of a silo is the shape of a hemishere of diameter 20 ft. if it is coated uniformly with a layer of ice, and if the thickness is decreasing at a rate of 1/4 in/hr, how fast is the volume of ice changing when the ice is 2 inches thick?
Answered by Penny Nom. |
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The ratio of two chemicals |
2008-10-20 |
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From Nathan:
if there is a chemical mixture of 5:2 and the total amount of the entire solution is 1400 gallons, how many gallons make up the stronger side of the solution? I believe the answer is 1,000 but I figured it out in a non-traditional way so I wanted to understand the basic formula used to determine these types of questions.
thank you
Answered by Penny Nom. |
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I borrowed 2000.00 at a rate of 7% for 1 year |
2008-10-20 |
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From carolita:
if i borrowed 2000.00 at a rate of 7% for 1 year what would be the interest
Answered by Penny Nom. |
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