Question

Help please?
Write a function that repersents this process:
A:Take a number,x.
B: Multiply it by4.
C: Subtract 2 from the result
Then find the inverse of this function. Does the inverse represent the reverse of the process above ? Explain why or why not.

Answer 1

You should be able to at least do the first part, writing the original function.

Answer 2

Yeah! Lets see it! It tells you what to write in the problem!

Answer 3

Would it be like x•4-2

Answer 4

Yes.

y = 4x - 2

Now to find the inverse, solve that equation for x = ...

Answer 5

You type faster @agent0smith .... :(

I'll let you have this one! >:D
You're in good hands OP

Answer 6

Would I divide it by 2?

Answer 7

y = 4x - 2

If you needed to find x, what would you do first?

Answer 8

Would you add 4 to both sides

Answer 9

No... you'd add 2 to both sides.

Answer 10

So it would be y=6x

Answer 11

Negative GhostRider. When you add a number without a variable you don't touch ones with variables.

So, the \[4x\]
would be left alone.
as would the \[y\]
Try again!

Answer 12

This makes no sense dude I'm literally so confused

Answer 13

(+2) y = 4x + 2 (-2)
y + 2 = 4x

Take it from there?

Answer 14

Oh my, i made a typo. Don't listen to me! D: I quit!

Answer 15

Let's start at what you said at the beginning. @ambermarie151

"Would it be like x•4-2"

What you did was take x and
1. Multiplied by 4
2. Then you subtracted 2

To get back to x you apply the "inverse" operations in the opposite order.

1. Add 2
2. Divide by 4

Let y = 4x - 2
y + 2 = 4x - 2 + 2
y + 2 = 4x
(y + 2)/4 = (4x)/4
y/4 + 1/2 = x

Note: inverse operations are operations that "undo" each other, for example multiplication and division.