0.25(22 – d) + d = 10.75
Here, d represents the number of dollar coins,
Since, the total coins = 22,
So, the number of quarts coin = 22 – d,
Also, 1 quarts = $ 0.25
Thus, the cost of 22-d quarts and d dollars = ( 0.25(22-d) + d ) dollars,
According to the question,
Total cost of coins = $ 10.75
⇒ 0.25(22-d) + d = 10.75
Which is the required equation.
Third option is correct.