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michelle8978
17.01.2020 •
Mathematics
Acollection of dimes and quarters is worth $6.50. there are 35 coins in all. how many dimes are there?
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Ответ:
x=Quarters y=Dimes
so the total number of coins is 35 the other equation is
.25x+.1y= 6.5
Now we can solve for x and y easily
y=35-x
We can substitute the into the other equation
.25x+.1(35-x)=6.5
Lets Simplify it
.15x=3.5=6.5
.15x=3
x=20
Now we can sub stitute x=20 back into the first equation to get y and if we get x+y=35 then 20+y=35 we know that there are 15 dimes left over so 20+15=35
Ответ:
20 quarters=5$ +15 dimes = 1.50 which = 6.50 and 35 coins
Ответ: