Intermediate Algebra

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The average cab ride cost per mile(x) is given by f(x)=2x+3.50, where x is miles and f(x) is money.

A. Find the cost of a 5 mile ride.

B. Find the cost of a 3/4 mile ride.

C. How many miles can you go in $50?

  • Intermediate Algebra -

    A.

    x = 5

    f ( 5 ) = 2 * 5 + 3.50 = 10 + 3.50 = 13.50 $


    B.

    x = 3 / 4

    f ( 3 / 4 ) = 2 * 3 / 4 + 3.50 = 6 / 4 + 3.50 = 6 / 4 + 7 / 2 = 6 / 4 + 14 / 4 = 20 / 4 = 5 $


    C.

    f ( x ) = 50

    50 = 2 x + 3.5

    50 - 3. 5 = 2 x

    46 . 5 = 2 x Divide both sides by 2

    46.5 / 2 = x

    23.25 = x

    x = 23.25 miles = 23 1 / 4 miles

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