Let f (x) = x+3 and g (x) = 4x-3. Find (f+g) (3).

Question

Mathematics

Emilia Gibson

3 December, 02:57

Let f (x) = x+3 and g (x) = 4x-3. Find (f+g) (3).

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Answers (1)

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Joselyn · Answer 1

(f + g) (3) = f (3) + g (3).

Find f (3).

f (3) = x + 3

f (3) = 3 + 3

f (3) = 6

Now find g (3).

g (3) = 4x - 3

g (3) = 4 (3) - 3

g (3) = 12 - 3

g (3) = 9

We finally add f (3) + g (3).

f (3) + g (3) = 6 + 9

f (3) + g (3) = 15

The answer is 15.