Question

f(x) = (x-5)/(9); g(x) = 8x + 5, find g(f(x))

Answer 1

\[g(f(x))=8[\frac{( x-5) }{ 9 }]+5\] and then just simplify.

Answer 2

The concept is that g(x) is a function and so is f(x) but f(x) is an input for g(x) so you just replace "x" with another function which is g(f(x))

Answer 3

I got 10.625 = x now.

Answer 4

8((x-5/9))+5

-5/8 = (x-5)/(9)

-5/8 * 9 = x-5

10.625 = x

Answer 5

That's completely wrong and i Know it.

Answer 6

A) g(f(x)) = x - (5/8)
B) g(f(x)) = x
C) g(f(x)) = 8x + 35
D) g(f(x)) = x + 10

Answer 7

Those are the options.

Answer 8

"8((x-5/9))+5 -5/8 = (x-5)/(9) -5/8 * 9 = x-5 10.625 = x" this calculation is wrong.

Answer 9

What do I have to do?

Answer 10

well the answer is not in the options, you sure the question is correct, no typo of sign?

Answer 11

its (x-5)/8 not 9 :P

Answer 12

the answer is "B"

Answer 13

Oops, haha thank you. No wonder I was having so much difficulty...

Answer 14

Even I didn't spot that mistake.

Answer 15

\[8[\frac{ (x-5) }{ 8 }]+5 = (x-5)+5=x\]
"8" in numerator and denominator get cancelled.

Answer 16

Thank you.