Question

30 < 10u < 120.

Answer 1

what is the question?

Answer 2

Solve the compound inequality 30 < 10u < 120.

Answer 3

this means that 10u is greater than 30
can you think of what values of u would solve this?

Answer 4

4 an up

Answer 5

good. Now, this also gives another condition.
10u < 100. can you think of values for u that solve this inequality?

Answer 6

sorry 10u<120

Answer 7

11 and down

Answer 8

very good. so u should be 4 and up or 11 and down. So what does this mean for the value of u?

Answer 9

That is, what is the range of values that u can take to solve this compound inequality?

Answer 10

I guess

Answer 11

So the answer would be 3 < u < 12 ?

Answer 12

okay lets go through this. 4 would solve 10u>30 AND 10u<120, correct? would 5 also solve it? would 10 also solve it? would 20 also solve it?

Answer 13

yes, very good!

Answer 14

well done!

Answer 15

Thanks for the help

Answer 16

you are welcome :)