Question

Help.

Answer 1

Consider the functions f(x) = 3x2 and g(x) = 2(x + 9). Find f[g(−7)]. Please show all of your work for full credit.

Answer 2

First find g(-7).
To do that
put -7 in place of x in g(x).
Can u plz tell me vat u get @xcarleighxs?

Answer 3

@ajprincess I got g(x) = 4

I did. g(x) = 2(x +9)

x = -7

so -7 plus 9 equals 2
Then 2 times two equals 4

Answer 4

ya perfect:)

Answer 5

Nw to find f(g(-7))
put 4 in place of x in f(x).
Can u do it @xcarleighxs?

Answer 6

Yep @ajprincess

I did F(x)= 3x^2

x = 4

so 4^2
Is 4 x 4 which comes out to be 16

and 3 times 16 equals 48/ is that correct?

Answer 7

ya perfect:)

Answer 8

So then to get the final answer.
I do F divided by G?

Answer 9

u are asked to find f(g(-7)) right?

Answer 10

Yup @ajprincess

Answer 11

well to find this

f[g(−7)]

Answer 12

Then that's vat u hav found by putting 4 in place of x in f(x).

Answer 13

oh okay!

Answer 14

To find F(g(-7)) u hav to find g(-7) and then substitute that value in place of x in f(x).

Answer 15

getting it @xcarleighxs?