Let f(x) = 4x^2 + 5x + 7. What is f(4)?

f)(x) = g(f(x)) = -4(5x - 7)2 + 4(5x - 7) + 4 = -100x2 + 280x - 196 + 20x - 28 + 4 = - 100x2 + 300x - 220

I think it's 4 hope it help

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!