Question

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Answer 1

Be careful setting them up, you set most of the inequalities up the wrong way... pay attention to the side lengths.

12) should be 2x-12 < 36
and you still need to solve 2x-12>0

13) should be 2y-7<28
and you still need to solve 2y-7 > 0

14) same mistake as the others... should be 4x-10<50
and you still need to solve 4x-10 > 0

Answer 2

what about: 2x-12 < 36

and 2y-7<28

and 4x-10<50

Answer 3

Is that correct?

Answer 4

Correct. Now can you combine these into one inequality for each question?

Do as we did in 11) x<38 and x>6 is the same as:
6 < x < 38

now try these:

12) x<24 and x>6

13) y<17.5 and y>3.5

14) x<15 and x>2.5

Answer 5

Excellent :)