lilyella1004
03.02.2020 •
Mathematics
Jessica has 48 coins, some of them are nickels and some are dimes. how many of each does she have if she has $3.25 total?
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Ответ:
9514 1404 393
31 nickels17 dimesStep-by-step explanation:
Let d represent the number of dimes Jessica has. Then 48-d is the number of nickels. Her total amount is ...
0.05(48 -d) + 0.10(d) = 3.25
2.40 +0.05d = 3.25
0.05d = 0.85
d = 17 . . . . . . . . . . divide by 0.05
48 -d = 31 . . . . . . number of nickels
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Check
31 nickels and 17 dimes will have a value of $1.55 +1.70 = $3.25 (as required)
Ответ:
yes,
Step-by-step explanation:because a triangle doesnt have to have the same length on each side as long as there is 3 points, angles, and sides. hope it helps!