213k views
5 votes
If f(x)=-7x+2 and g(x)=√x+3 what is (f °g)(-2)

2 Answers

4 votes

Answer:

-5

Explanation:

I just took it and got it right.

User Tom Lokhorst
by
8.7k points
4 votes

Answer:
(f\°g)(-2)=-5

Explanation:

The first step is substitute the function
g(x)=√((x+3)) into the function
f(x)=-7x+2


(f\°g)(x)=-7(√((x+3)))+2\\(f\°g)(x)=-7√((x+3))+2

Now, you need to substitute x=-2 into
(f\°g)(x)=-7√((x+3))+2 and simplify the function.

Finally you get that
(f\°g)(-2) is:


(f\°g)(-2)=-7√((-2+3))+2\\(f\°g)(-2)=-7√(1)+2\\(f\°g)(-2)=-7(1)+2\\(f\°g)(-2)=-7+2\\(f\°g)(-2)=-5

User Skulaurun Mrusal
by
8.6k points

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