Question

1. If y varies directly with z, and = 7 when y= 28, find y when z = 13.

Answer 1

y=52

Explanation:

If z=7 when y=28, z is being multiplied by a number (e.g., x) and to figure out x, you would do 28/7=4, x=4

If z=13, you know that you have to multiply 13 and x. 13(4)=52. y=52