When you buy a new car, you have to pay sales tax and in Texas that is 6.25%. Some people roll that sales tax into the loan they will get for their car and pay it off as part of their car payments. Others pay cash for the sales tax at the time of purchase in hopes that the loan payments will be less. You plan to pay cash for the sales tax on your new car. The car you have chosen costs $23,550, so you need to have $
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in cash with you when you purchase the car.

Runners run around the school's football field. the cross country coach determines that the width of the field is seventy yards shorter than the length. part a write an expression that represents the perimeter of the football field. let x represent the length of the football field. include parentheses in your expression. next, write an equivalent expression that does not include parentheses. what property or properties did you use to simplify? explain. part b the cross country coach later determines that the length of the football field is 120 yards. all students must run five laps. using your answer from part a, determine the actual number of yards that each athlete must run in the tryouts. in order to make the team, students must complete the laps in 6 minutes. how quickly must they run each lap?