Raymond B. answered 01/09/21
Tutor
5
(2)
Math, microeconomics or criminal justice
D=3Q
10D + 25Q = 7700
10(3Q) + 25Q = 7700
30Q +25Q = 7700
55Q = 7700
5Q = 700
Q = 700/5 = 140 quarters = $35
D = 3(140) = 420 dimes= $42
42+35 = $77