Question

can someone help me figure out this question.

Let f(x) = -­2x ­- 7 and g(x) = ­-4x + 3. Find (f o g)(-­5)

A.-9
B.23
C.-53
D.3

Answer 1

You should think of (f o g)(-5) as f(g(-5)). So use x = -5 for g(x) first and plug that in to see what you get first.

Answer 2

So what is g(-5) then?

Answer 3

I haven't done this in almost a year i dont even know how to set it up anymore

Answer 4

Ok well g(-5) is just saying that you need to use x = -5 for the function g(x) that's given. So just plug -5 into g(x) which would be g(-5) = -4(5) + 3

Answer 5

And actually that's -4(-5) + 3 ^^