In a change jar, tom has nickels and dimes. the number of nickels is two times the number of dimes and the total amount of money in the jar is $1.20. how many dimes are in the jar? a) 6 b) 12 c) 10 d) 24

N=number of nickles

d=number of dimes

n is 2 times d

n=2d

total money is 1.20

convert to cens

120 cetns

5n+10d=120

n=2d

5 (2d) + 10d=120

10d+10d=120

20d=120

divide both sides by 120

d=6

6 dimes is answer

answer is A, 6 dimes