The cost of renting a game at the video store can be described by the function y=5x+4 , where y is the total cost and x is the number

Question

The cost of renting a game at the video store can be described by the function y=5x+4
, where y is the total cost and x is the number of days. If Justin has $18 to spend, what is the maximum number of days that he can rent a game if tax is not considered

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Thu Thủy 5 years 2021-07-25T02:46:51+00:00 1 Answers 16 views 0

Answers ( )

  1. Giakhanh
    0
    2021-07-25T02:48:47+00:00
    Reply

    Answer:

    2 days

    Step-by-step explanation:

    Use the given formula

    y = 5x + 4

    The information:

    y is the money spent

    x is the number of days

    It is known that Justin spent $18

    so now just substitute in that value

    $18 = 5x + 4

    and simplfiy by inverse operations

    18 = 5x + 4

    -4        -4

    14 = 5x

    /5    /5

    2.8 = x

    As per this problem, one can infer that renting a game is done by days, and will be charged in days, hence renting a game for 0.8 days is pointless

    meaning that the final answer is 2 full days

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