Question

Please help me with 5-7

Answer 1

2y+12 < 42

subtract 12 from both sides to isolate the 'y'

2y<30

since '2y' is multiplication, the opposite is division. divide by 2 to isolate the 'y'. doing so will flip the < sign to make it >.

y > 15

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She makes $15 an hour. Her employers take out $125 weekly. She gets a paycheck for $205 that week.

Add the $125 back in that her employer took out and you can find how much she earned that week, it's $330. Divide $330 by $15 to find that she worked a minimum of 22 hours that week.

15h-125=205

15h=330

h=22

plug 22 in to the equation 15h-125=205 to check your answer
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I can't help you with the last one. Best of luck though man and god bless.