Question

I really need help; Let F(x)=8x-7 and g(x)=8x+8. Find (f*g)(7)

Answer 1

any idea

Answer 2

Find the f function's value at x=7 and then find the g function's value at x = 7. Then multiply those results together to get the answer.

Answer 3

Any idea?

Answer 4

i got lost can you explain it step by step

Answer 5

i know the answer is 505 but i want to know the steps so i can really understand it

Answer 6

(f*g)(7) = f(7) * g(7)

fx) = 8x - 7
f(7) = ?

g(x)=8x+8
g(7) = ?

f(7) * g(7) = ?

Answer 7

Is it (f*g)(7) OR (fog)(7) ?

Answer 8

it is (f times g)

Answer 9

No it is not!

Answer 10

(f times g) (7)

Answer 11

\[
(f \circ g)(7)
\]

Answer 12

yes

Answer 13

That is not f times g.
\[(f \circ g)(7) = f(g(7)) \\
g(x) = 8x + 8 \\
g(7) = ?
\]

Answer 14

f(x)=8x-7 and g(x)8x+8
Find (f∘g) (7)

Answer 15

i still dont understand how to do the step

Answer 16

Yes, you have to do it in two steps:
(fog)(7) = f(g(7))
Find g(7) first. What do you get?

Answer 17

g(x) = 8x + 8
g(7) = ?

Can you answer this step first?

Answer 18

ok

Answer 19

i got 64

Answer 20

correct.
\[
f(x) = 8x - 7 \\
f(g(7)) = f(64) = ?
\]

Answer 21

You calculated g(7) = 64
So f(g(7)) = f(64) = ?

Answer 22

this is the part when i get lost

Answer 23

f(x) = 8x - 7
f(64) = 8*64 - 7 = 512 - 7 = 505