Question

Solve each function for the given value.

Equation Given Value
Solution


a.) y = 15x - 50
when x = 7


b.) y = 1/2x + 20
when x = 50


c.) y = (3x)2 - 36
when x = 3


d.) y = 2.5x + 3.8
when x = 0.66

Answer 1

a) y = 55

b) y = 45

c) y = -18

d) y = 5.45

Explanation:

y = 15x - 50 when x = 7

y = 15(7) - 50

y = 105 - 50

y = 55

y = 1/2x + 20 when x = 50

y = 1/2(50) + 20

y = 25 + 20

y = 45

y = (3x)2 - 36 when x = 3

y = (3(3))(2) - 36

y = 9(2) - 36

y = 18 - 36

y = -18

y = 2.5x + 3.8 when x = 0.66

y = 2.5(0.66) + 3.8

y = 1.65 + 3.8

y = 5.45