# Math 1.7

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 Author: Mossy ID: 218652 Filename: Math 1.7 Updated: 2013-05-08 19:34:31 Tags: Folders: Description: Chapter 1 -Bulding Mathematical Models Using Variation Show Answers:

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1. Write an equation that relates the quantities.
-W varies jointly with n and s and inversely with the cube of t. The constant of proportionality is 8.14.
W=
2. Write a general formula to describe the variation.
-z varise directly with the sum of squares of x and y; z=2 when x=6 and y=2
z=
3. Write a general formula to describe the variation.
- The square of T varies directly with the cube of a and inversely with the square of d; T=6 when a=3 and d=5
T2=
4. Write a general formula to describe the variation.
- y varies directly with x; y=6 when x=48
y=
5. Decide whether the following statement is true or false.
-If y varies directly with x, then y=, where k is a constant.
False
6. Write a general formula to describe the variation.
-A varies directly with x2; A=50 when x=5
A= 2x2

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