aria2289
02.09.2020 •
Mathematics
19. Amy has 8 coins worth $1.40. Some of the coins are nickels and some are quarters. How many of each coin does Amy have?
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Ответ:
5 quarters and 3 nickels
Step-by-step explanation:
x = nickels
y = quarters
x + y = 8
x(0.05) + y(0.25) = 1.40
3 + 5 = 8
3(0.05) + 5(0.25) = 1.40
0.15 + 1.25 = 1.40
1.25 + 0.15 = 1.40
Ответ:
answer: 7 days.
step-by-step explanation: