Question

f(x) = 4x- 7; g(x) = x + 3

What is the value of (f * g)(4)? (Points : 4)
4
9
12
21

Answer 1

g(x) = x + 3

g(4) = 4 + 3 ... replace every x with 4

g(4) = 7

Answer 2

\[\Large (f \circ g)(x) = f(g(x))\]

Answer 3

\[\Large f(x) = 4x-7\]

\[\Large f(g(x)) = 4(g(x))-7\]

\[\Large f(g(4)) = 4(g(4))-7\]

\[\Large f(g(4)) = 4(7)-7\]

I'll let you finish up

Answer 4

21?

Answer 5

correct

Answer 6

thanks

Answer 7

np