Question

F(x)=7x+4 and g(x)= sqrt x+4 what is (f°g)(-3)

Answer 1

-17

Explanation:

Given the question two functions,

f(x) = 7x+4

and

g(x) = √(x+4)

To find,

(f °g)(-3)

Step 1

Find (f °g)

(7x+4)(√(x+4))

7(x)√(x+4) + 4√(x+4)

Step 2

Plug x = -3

7(-3)√(-3+4) + 4√(-3+4)

-21 + 4

-17