Question

Given that f(x) = 5x − 10 and g(x) = x + 3, solve for f(g(x)) when x = −1.

−30

0

10

12

Answer 1

plug in all of g(x) into f(x) wherever you see "x"

f(g(x)) = 5(g(x)) - 10 = 5(x+3) - 10

Then just substitute that expression above with x=-1

Answer 2

so its 10 ?

Answer 3

no

Answer 4

make sure you calculate all of 5(x+3) - 10

Answer 5

oh no its 0 ?

Answer 6

yes =]

Answer 7

thank you :D

Answer 8

yw!