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A customer had a two-year car lease which required $2,500 down with $599
monthly payments. Her lease had a mileage limit of 12,000 miles a year and
charged 15 cents a mile for each mile over the limit. Her total mileage for the
two years was 32,850 miles. What was the total cost of the lease over its term?
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Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

Which statement accurately explains whether a reflection over the y-axis and a 270° counterclockwise rotation would map figure acb onto itself? a coordinate plane with figure acb with point a at 1, 1, c at 3, 4 and b at 5, 1 yes, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) yes, a″c″b′ is located at a″(1, 1), c″(3, 4), and b″(5, 1) no, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) no, a″c″b″ is located at a″(1, 1), c″(3, 4), and b″(5, 1)

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?