kingswriters3250
24.06.2019 •
Mathematics
Ajar contains n nickels and d dimes. there are 30 coins in the jar, and the total value of the coins is $2.20. how many nickels and how many dimes are in the jar?
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Ответ:
16 Nickles and 14 Dimes
Step-by-step explanation:
What we know
n + d = 30.05n + .1d = 2.2 (total change equals $2.20) (.05n + 0.1d = 2.2) -10-.5n - d = -22.5n = 8n = 16Ответ:
0.3
Step-by-step explanation: