Question

F(x) = 6x + 5 and x(y) = 4y2 – 25 For the given functions, find f(x) if y = 3.

Answer 1

if my math is right the answer is f(x) =11(19)

Explanation:

f(x) =6x+5

divide x form both sides

f=6+5

f=11

x(y) =4y2-25

x(3) =4 (3) 2-25

divide 3 from both sides

x=4(1) 2 -25

add the 4 and 2

x=6(1)-25

x=6-25

x=19

f=11 x=19