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5 February, 04:03

Mark is taking pledges for bike-a-thon fundraiser. John pledged $2.00, plus $1.75 for each mile Mark bikes. Kiara pledged $5.25, plus $0.25 for each mile Mark bikes. Write an expression for the numbers of dollars pledged and the number of dollars kiara pledged. Use M for the number of miles that Mark bikes.

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  1. 5 February, 04:10
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    The equation for the amount of dollars pledged in total is f (M) = 2.00M + 7.25, and the amount for just Kiara is f (M) = 0.25M + 5.25

    Step-by-step explanation:

    The amount they pledge up front is a constant and therefore need to be added to the end of the equation. The amount per mile should be a variable amount. This gets multiplied by the M variable. So we start with the Kiara amount.

    0.25 per mile = 0.25M

    5.25 pledged = 5.25

    Now put them together to get f (M) = 0.25M + 5.25

    Do the same with Mark.

    1.75 per mile = 1.75M

    2.00 pledged = 2.00

    Now put them together to get f (M) = 1.75M + 2.00

    To get the final total, we add both equations together.

    f (M) = 0.25M + 5.25 + 1.75M + 2.00

    f (M) = 2.00M + 7.25
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