Jack and Jill had a lemonade stand. At the end of the day they had 75 nickels and quarters totaling $6.75. How many of each type of coin do they have?

Question

Jack and Jill had a lemonade stand. At the end of the day they had 75 nickels and quarters totaling $6.75. How many of each type of coin do they have? PLEASE ANSWER IT!

Answer 1

N = number of nickels

75 - N = number of quarters

N*0.05 = money from nickels

(75-N)*0.25 = money from quarters

6.75 total money

N*0.05 + (75-N)*0.25 = 6.75

0.05N + 18.75 - 0.25N = 6.75

-0.20N = -12

N = 60

number of quarter = 75 - N = 75 - 60 = 15

check 0.25*15 + 0.05 * 60 = 6.75