Christiana makes $14 per hour working at the roller-skating rink. She needs to make $130 to pay her car insurance. How many hours should she work if she receives an $18 tip for hosting a birthday party that day?

Answer 1

Let h be the number of hours Christiana works at the roller-skating rink.
She makes 14h dollars from work.
With the tip, she makes 14h + 18 = 130 dollars.
Thus, 14h = 130 - 18 = 112 dollars.
So she should work h = 112 / 14 = <<112/14=8>>8 hours. Answer: \boxed{8}.