Question

need somebody to double check my work

Answer 1

\[\frac{ 3x-4 }{ 5}\]

Answer 2

@whpalmer4

Answer 3

what work... tell me...

Answer 4

i thought you was suppose to multiple 5 with the equation

Answer 5

you need to find the value of "x".....? or what

Answer 6

yea

Answer 7

well x=4

Answer 8

3x-4/5=0
3x-4=0
3x=4
x=4/3

Answer 9

f(4)=3x-4 over 5

Answer 10

f(4)=3*4-4
f(4)=12-4
f(4)=8

Answer 11

but what happens to the 5

Answer 12

just insert 5 in f(x)

Answer 13

im lost now

Answer 14

ahhh...ok see
f(5)=3*5-4
f(5)=15-4
f(5)=11

Answer 15

i didnt think you was suppose to that cause f(x)=f(4) already

Answer 16

no dear... we had already 5 there too

Answer 17

but in the question there are 3 different equation and two equation has the same solution

Answer 18

the first equation i had got 8 and the other one i got 9 so this equation final answer should be 8

Answer 19

@handyandy3 @CGGURUMANJUNATH @Kilorion @whatyouknowboutdat @yoletstalk @TuringTest

Answer 20

The problem as you've posted it here is incomplete. Can you tell us exactly what the original problem says, or post a screenshot or photo?

Answer 21

Which of the following statements have the same result? Explain each step in solving each one.

f(3) when f(x) = 2x + 2
f-1(4) when f(x) = 3x minus 4, all over 5
y + 10 = 2y + 1

Answer 22

i hope that kind of help i had already figured out the first equation and the third equation i just cant seem to figure out the second equation

Answer 23

Okay. That's much better!

\[f(x) = 2x+2\]\[f(3) = 2(3)+2 = 8\]

\[y + 10 = 2y + 1\]\[10 = y + 1\]\[y = 9\]

Answer 24

ok i did that 1 already and i did the first one as well i need help with the second one

Answer 25

\[f(x) = \frac{3x-4}5\]To find \(f^{-1}(x)\) we swap the variables and solve for \(x\)

\[y = \frac{3x-4}{5}\]swap variables:
\[x = \frac{3y-4}{5}\]Solve for \(y\)
\[5x = 3y-4\]\[5x+4 = 3y\]\[y=\frac{5x+4}{3}\]\[f^{-1}(x) = \frac{5x+4}{3}\]

Now you plug in the desired value of \(x\) and evaluate the result.

Answer 26

ok so 5*4=20
20+4=24
24/3=8
omg thank you so much for helping me:))))

Answer 27

You're welcome!