Question

Which of the following statements have the same result? Explain each step in solving each one.
I.f(2) when f(x) = 3x + 2
II.f-1(3) when f(x) = 2 x minus 7, all over 3
III.2y + 14 = 4y - 2

Answer 1

did you replace x with 2 for I?

Answer 2

in II how you have to do is replace f(x) with 3 and solve for x.
III. you solve for y.

Answer 3

so I is 8

Answer 4

@freckles

Answer 5

and II. i get -1/3 is that correct

Answer 6

let see 3(2)+2 is 6+2 which is 8 so yes for I

Answer 7

\[3=\frac{2x-7}{3}\]
I think this is what you have above?

Answer 8

and I asked you to replace f(x) with 3 since we want to find f^(-1)(3)

Answer 9

hmm solving that shouldn't give -1/3

Answer 10

idk what the answer is

Answer 11

@freckles

Answer 12

did you try solving the equation I have above?

Answer 13

what is 3(3)?

Answer 14

\[3=\frac{2x-7}{3} \\ 3(3)=2x-7\]

Answer 15

and I will give you another hint
add 7 on both sides

Answer 16

so its 8

Answer 17

so they all have the same result

Answer 18

it seems so
:)