A jar contains nickels and d dimes. There are 28 coins in the jar, and the total value of the coins is $2.00. How many nickels and how many

Question

A jar contains nickels and d dimes. There are 28 coins in the jar, and the total value of the coins is $2.00. How many nickels and how many dimes are in the jar ?

in progress 0
Doris 3 months 2021-08-22T11:37:58+00:00 1 Answers 2 views 0

Answers ( )

    0
    2021-08-22T11:39:34+00:00

    Answer:

    12 dimes and 16 nickels

    Step-by-step explanation:

    D +N =  28

      N = (28-D )

    I will multiple the next by 100 to avoid decimals dines: 10 instead of  0.10….

    10D + 5(28-D) = 200

    10D + 140-5D = 200

    5D = 60

    D = 12   (12 dimes)

    28-12 = 16  (16 nickels)

    12x 0.10 + 16 X 0.05 = 2.00

    $1.20 + $0.80 = $2.00

Leave an answer

Browse

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