"VARIATION" ( MATH PO)

1. a / 35 = 5 / 7 *

A. 25

B. 20

C. 15

2. 7 / 9 = y / 63 *

A. 54

B. 52

C. 49

3. 8 / x = 96 / 156 *

A. 9

B. 12

C. 13

4. (3x+7)/(x^2-9)= (2x+4)/(x-3)*

A. 1 or 2 /5

B. - 5/ 2 or - 1

C. - 1 or 4/3

5. 3m -4 / m = 2m / m +2 *

A. 4 or 2

B. -4 or 2

C. 4 or -2

6. For each of the following y varies directly proportional to x. When x = 3, y = 9. Find the constant of proportionality. *

A. 3

B. 6

C. 1/3

7. Given the values of x and y in the preceding problem, find y when x = 8. *

A. 8

B. 21

C. 24

8. When x = 8, y = 2. Find the constant of proportionality. *

A. 4

B. 1/2

C. 1/4

9. Given the values of x and y in the preceding problem, find y when x = 64. *

A. 8

B. 16

C. 256

10. When x = 7, y = 11. Find the value of y when x = 28. *

A. 33

B. 44

C. 55

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