Answer:
17 hours
take $192 and divide it by 12 so you know how much they make per hour
$192 / 12 = 16
then you're going to take $272 and divide it by what you know now - how much they make per hour (this will get you how many hours they worked)
$272 / 16 = 17
15% of 45.4=6.81 this is the final answer
Answer:

<h3><u>For the 1st part</u></h3>




<h3><u>For the 2nd part</u></h3>
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2-(-x+5)
2+x-5
x-3
I decided to included the steps just in case you needed them