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24 votes
24 votes
Using f(x) = x-2 and g(x) = 5x+3, find f(g(-4)).

f(g(-4)) =

User Mittal
by
2.6k points

2 Answers

21 votes
21 votes

Answer:


f(x) = x - 2 \\ g(x) = 5x + 3 \\ f(g(x)) = (5x + 3) - 2 \\ f(g(x)) = 5x + 3 - 2 \\ f(g(x)) = 5x + 1 \\ f(g( - 4)) = 5( -4) + 1 \\ f(g( - 4)) = - 20 + 1 \\ \boxed{f(g( - 4)) = - 19}

  • f(g(-4)) = -19 is the right answer.

User Simplelenz
by
3.1k points
16 votes
16 votes

Answer:

  • -19

Explanation:

Given:

  • f(x) = x-2 and g(x) = 5x+3

Find g(-4) first:

  • g(-4) = 5(-4) + 3 = -20 + 3 = -17

Now find f(-17):

  • f(-17) = -17 - 2 = -19
User VonSchnauzer
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2.2k points