A charter school did a local beach cleanup. They collected a total of 55 pounds of plastic bottles and aluminum cans. The California refund

Question

A charter school did a local beach cleanup. They collected a total of 55 pounds of plastic bottles and aluminum cans. The California refund value for plastic is $1.60 per pound and $1.28 per pound for aluminum. The school recycled a total of $77.60 worth of plastic and aluminum. How many pounds of each, plastic and aluminum, did the class collect?

in progress 0
Edana Edana 5 years 2021-08-04T12:41:31+00:00 1 Answers 103 views 0

Answers ( )

  1. diemkieu
    0
    2021-08-04T12:42:43+00:00
    Reply

    Answer:

    Plastic is 22.5 pounds and aluminum is 32.5 pounds.

    Step-by-step explanation:

    total junk = 55 pounds

    Value of plastic = $ 1.60 per pound

    Value of aluminum = $ 1.28 per pound

    Total value= $ 77.60

    Let the plastic is p and the aluminum is 55 – p.

    Total cost

    77.60 = 1.6 p + (55 – p) x 1.28

    77.60 =  1.6 p + 70.4 – 1.28 p

    7.2 = 0.32 p

    p = 22.5 pounds

    So, plastic is 22.5 pounds and aluminum is 32.5 pounds.

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )