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26 June, 13:39

The charge to ship a package from one town to another, C, is given below as a function of the weight of the object, w, in pounds.

C = $2.50 + $0.55w

If the shipping cost for Cathy's item was $7.29, what was its weight?

A.

18.7 pounds

B.

0.87 of a pound

C.

87 pounds

D.

8.7 pounds

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Answers (2)
  1. 26 June, 13:53
    0
    D) 8.7lbs

    Subtract $2.50 from the total cost, because that's a fixed number, then do more math and boom, just like magic, it's solved.
  2. 26 June, 13:55
    0
    8.7 pounds

    Step-by-step explanation:

    7.29 = 2.5 + 0.55 w

    0.55 w = 7.29 - 2.5

    0.55 w = 4.79

    w = 4.79 / 0.55

    w. 8.7
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