Question

- r/4 < 8

Solve.

A. r < -32

B. r > -32

Answer 1

Hey there! We need to isolate 'r'!

Answer 2

Okay

Answer 3

Since we're dividing r by 4, we need to do the opposite to get rid of 4.

What's the opposite of division?

We'll get to that negative in a while!

Answer 4

We need to multiply 8 and 4?

Answer 5

correct! So what is 8 x 4= ?

Answer 6

32, i just dont know which one it is.

Answer 7

So now we have

-r < 32

Now, here's the tricky part! Just stay with me! :)

Answer 8

We need to get rid of the negative sign by w. We can do that by multiply both sides by -1.

-1 x -1 = 1

But here's the catch.

When we deal with inequalities, if we ever multiply or divide by a negative number that means we need to change the sign!

Answer 9

Hm, So A.?

Answer 10

Let me give you an example.

-x > 4

If I multiply -1 on both sides, I have isolated 'x' but I'll need to flip the sign from > to a <.

So

-x > 4

-x * -1 > 4 * -1

x < -4

So do the same for your question!

You have

-r < 32

Solve for r! :D

Answer 11

Okay i got the anwser, thx!

Answer 12

B, correct?

Answer 13

Correct! :)

Answer 14

Thanks!