If a bag contains 12 quarters, 6 dimes, and 18 nickles, what is the part-to-whole ratio of quarters to all coins?
a. 1: 2
b.1: 3
c.1: 4
d.1: 6

12+6=18      18+18=36 total coins.
12 quarters:36 coins.
To simplify divide each side by 12.
12/12=1     36/12=3
The simplified ratio is 1:3.

Therefore the answer is B.

Hope this helps! (:

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!

The answer is : 63explanation 60 times 0.05360+363