Giuliana has 22 quarters and dollar coins worth a total of $10.75. Which equation can be used to find d, the number of dollar coins Giuliana has?

Given: 22 quarters and dollar coins worth 10.75 quarters = 0.25  dollar = 1.00 q + d = 22 0.25q + d = 10.75 q = 22 - d 0.25(22-d) + d = 10.75  5.5 - 0.25d + d = 10.75 0.75d = 10.75 - 5.5 0.75d = 5.25 d = 5.25/0.75 d = 7