Question

f(x)=-2x-7 and g(x)=-4x+6. Find the (g o f)(-5)

Answer 1

you know how to get (g o f) (x) ??

Answer 2

i do not remember

Answer 3

ok, to get (g o f) (x)
just plug in 'x' = -2x-7 (which is f(x)) in place of 'x' in -4x+6 (which is g(x))

Answer 4

so -4x+6(-2x-7))?

Answer 5

you just multiplied them ?
you need to replace the x in g(x)

g o f (x) = -4 (-2x-7) +6 = ... ?

Answer 6

do i distribute the -4 into the parentheses

Answer 7

yes! do it...

Answer 8

8x+28=6

Answer 9

you mean 8x+28+6 ?

Answer 10

yeah

Answer 11

then, yes that would be your (g o f)(x)
to get (g o f) (-5), just plug in x=-5 in that!

Answer 12

8(-5)+28+6=-6

Answer 13

correct!

Answer 14

thank you

Answer 15

welcome ^_^