Question

can you check my work?

In () are the ones i chose

1.Given the function f(x) = 2(x + 8), find x if f(x) = 12

(2)

40

−2

14

#2.Given the function g(x) = −4x + 5, find g(−4).

−11

21

(2.25)

11

#3. If h(x) = −2x − 10, find h(−4).

−2

−18

(−3)

−16

Answer 1

[3.06] If f(x) = 2x2 − 10, find f(5).

90

10

7.5

40

I also dont know the answer to this one

Answer 2

Given the function f(x) = −2x + 8, find x if f(x) = 22.

−36

(−7)

52

−15

Answer 3

number 2 is wrong I think :

\[g(-4) = -4 \times -4 +5 = 16 + 5 = 21\]

Answer 4

on number 3 you got the same mistake as number 2 :
\[h(-4) = -4 \times -2 - 10 = 8 - 10 = -2\]

Answer 5

see, first you solve the multplication, remember that a negative number times a negative number is a positive number then you subtract.

Answer 6

okay so g(x) = −4x + 5, find g(−4) do I plug in -4 in both the x
.

Answer 7

you plug -4 in where you got a x in the function.

g(-4) means you are going to find what number the function g will give you if you plug -4 in place of x

Answer 8

the last one ou posted is correct and the one before that I didnt understand the function

Answer 9

its fine i got it thank you!