TexaSuperdude
01.07.2019 •
Mathematics
Nina has some nickels and 9 pennies in her pocket. her friend, maurice has twice as many nickels as nina. together these coins are worth 84 cents. how mant nickels does nina have? let n = the amount of nickels nina has
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Ответ:
So Maurice would have 2N nickels
Total number of coins is N + 2N + 9 = 3N + 9
Each nickel is 5 pennies
3N of nickels = 15N pennies
Their worth is 84 cents
15N + 9 = 84
15N = 75
N = 75/15 = 5
N = 5
This means Nina has 5 nickels.
Ответ: