Posted by **meme** on Wednesday, March 21, 2012 at 9:51am.

If y varies directly as x^2 and y=20 when x=4, find y when x=7?

- college Algebra -
**Henry**, Thursday, March 22, 2012 at 6:19pm
Y = kx^2 = 20. x = 4.

k*4^2 = 20.

16k = 20. k = 20/16 = 5/4.

Y = kx^2.

Y = (5/4)*7^2 = 61 1/4 = 61.25.

- COLLEGE ALGEBRA -
**Rose**, Saturday, March 24, 2012 at 10:23pm
An investment of $63,000 was made by a business club. The investment was split into three parts and lasted one year. The first part of the investment earned 8% interest, the second 6% and the third 9%. Total interest from the investments was $4950. The interest from the investment was 4 times the interest from the second. Find totals of the three parts of the investment. What is the amount of the first part of the investment?

- college Algebra -
**Rose**, Saturday, March 24, 2012 at 10:24pm
A hardware supplier manufactures three kinds of clamps, type A, B, and C. Production restrictions force it to make 20 more type C clamps than the total of the other types and twice as many as B clamps as type A clamps. The shop must produce 380 clamps per day. How many of each type are made per day? How many type A clamps are produced?

## Answer This Question

## Related Questions

- Pre-Algebra - If y varies directly with x, find the constant of variation with x...
- Math - DIRECT VARIATION 1. a is directly proportional to b.If a=15,then b=9 2. m...
- Pre-Calc - 1.) Suppose that y varies directly as x. If y is 5 when x is 30, the ...
- College Algebra - y varies directly as the third power x and inversely as Z. If ...
- college algebra - Solve each variation problem. n varies directly as q, and n= ...
- algebra1 - M varies directly with n; m=144 when n=8. What is the constant of ...
- math - t varies directly as the square root of l. If l=81, then t=10 what is the...
- Algebra II - 1. If y varies directly as x, and y=30 when x=4, find the constant ...
- Variation - I have few questions that I need checked please and could you help ...
- Math - This is regarding direct variation. y varies directly as the square of R...

More Related Questions