seawu
06.12.2020 •
Mathematics
Please help fast!! Katrina has $3.60 worth of nickels and dimes. She has 46 coins in total. How many nickels and dimes does she have?
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Ответ:
20 nickels and 26 dimes
Step-by-step explanation:
She has $3.60 in nickels and dimesa nickel is $0.05 and a dime is $0.10let n be the number of nickels and d be the number of dimesthus the first equation is 3.6 = 0.05n +0.1dIf she has 46 coins then n + d = 46then n = 46 - dsub n = 46 - d into 3.6 = 0.05n +0.1d3.6 = 0.05(46 - d) + 0.1d3.6 = 2.3 -0.05d+0.1d1.3 = 0.05d26 = dsub d = 26 into n+d=46n+26=46n=20Check by subbing n=20 and d=26 into 0.05n +0.1d0.05(20) +0.1(26)1+2.6 = 3.6Ответ:
wow this is the first time I've heard of " diwali" I'll search it up
Step-by-step explanation: