Question 140144
Let x=number of dimes
3.5x=number of nickels
0.5x=number of quarters

Now we are told that the above adds up to 130. so:

x+3.5x+0.5x=130
5x=130
x=26---number of dimes=0.10(26)=$2.60
3.5x=3.5*26=91 number of nickels=0.05(91)=$4.55
0.5x=0.5(26)=13 number of quarters =0.25(13)=$3.25

So:
$2.60 + $4.55 + $3.25=$10.40

CK 26+91+13=130
130=130


Hope this helps----ptaylor