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Math 101

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1. Best Rentals charges a daily fee plus a mileage fee for renting its cars. Barney was charged $123.00 for 3 days and 300 miles, while Mary was charged $216.00 for 5 days and 600 miles. What does Best Rental charge per day, for mileage?

2. There were 44,000 people at a ball game in Los Angeles. The day's receipts were $369,000. How many people paid $ 13.00 for reserved seats and how many paid $6.00 for general admission?

  • Math 101 - ,

    1. They give two sets of information. Letting d = the daily charge, and m be the mileage charge, and c be the total charge

    c = d + m*x where x miles are driven

    123 = 3d + 300m
    216 = 5d + 600m

    Subtract the second from twice the first:

    246 = 6d + 600m
    216 = 5d + 600m

    30 = d
    so, 0.11

    so,

    c = 30 + 0.11x


    2.

    369000 = 13r + 6(44000-r)
    369000 = 13r + 264000 - 6r
    105000 = 7r
    r = 15000 reserved seats
    29000 general seats

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