Keith has p pennies, n nickels, and d dimes in his pocket. The total
number of coins is 12. The expression 0.01p + 0.05n + 0.100
represents the value of the coins, which is equal to $0.60. He has one
fewer nickel than dimes. How many pennies does Keith have?

The solution is

a. she will receive a refund of $278.

step-by-step explanation:

$9.89

step-by-step explanation:

9.90 = p x .06 x .25 (3/12 changed to a decimal)

9.90 = p x 0.015

9.90 - 0.015 = p

9.89 = p

step-by-step explanation:

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27 +27 or 27times 2=54

the diffrence is 0