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Adan
Mathematics
11 March, 20:14
40 coins. 25 and. 10 how many to make $7.75
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Lydia Ferguson
11 March, 20:25
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7.75
40 coins.
But you have a quarter and a dime. (.35)
so,
3 quarters, subtract. 35 = 75-35=40
There's my answer.
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Genesis Mercado
11 March, 20:32
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D + Q = 40 so D = 40 - Q
.25Q +.10D = 7.75
substitute D = 40 - Q into. 25Q +.10D = 7.75
.25Q +.10D = 7.75
.25Q +.10 (40 - Q) = 7.75
.25Q + 4 -.10Q = 7.75
.15Q = 3.75
Q = 25
D = 40 - 25 = 15
answer
Quarter = 25 coins
Dime = 15 coins
double check
25 + 15 = 40 coins total
25 (.25) + 15 (.10) = 6.25 + 1.5 = 7.75
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