Posted by **TOTALLY lost** on Sunday, March 11, 2012 at 11:04am.

I have 5 problems I seem to not be able to comprehend out of 150 that are due Tuesday. I have tried every which way to solve them on my own..please help.

Find the variation constant in which y varies inversely as x, and the following condition exists.

Y=30 when x = 1/6

k will = ____.

============================

The strength S of a rectangle beam varies jointly as its width w and the square of its thickness t.

If a wood beam 6 inches wide and 5 inches thick supports 500 pounds, how much can a similar beam 6 inches wide and 3 inches thick support? Round to the nearest pound if needed.

Thank you ahead of time for any consideration .

- Lost in the pits of ALG -
**Steve**, Sunday, March 11, 2012 at 1:28pm
since y varies inversely as x, xy=k, a constant

1/6 * 30 = k

5 = k

-------------------------

S(w,t) = kwt^2

500 = k*6*25

500 = 150k

k=4

So, now we know k, and we can figure S from any w and t:

S(6,3) = 4*6*9 = 216

## Answer this Question

## Related Questions

- Geometry-Solve for x - ok so I have to solve for x in this problem. and I have ...
- Math - How would you solve for A 5 x 3^(x+2)= A x 3^(x) Please help me, I have ...
- physics. - I have tried the problems. the only thing is the difference in names...
- Survey of Calculus (Algebra too) - For the supply equations, where X is the ...
- math - Suppose that we strike a bargain, and we agree that in this chapter, for ...
- English - Homework Help: English Posted by rfvv on Tuesday, March 12, 2013 at 6:...
- calculus - I have posted this question earlier and had the answer given to me ...
- math proportional relationships - Help me please I am stuck on these ...
- Nothing Realted - I know this question should not be here but my samsung galaxy...
- Math 156 - A share of stock sold for $50 on Monday. On Tuesday it lost 5% of its...