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depinedainstcom
21.10.2020 •
Mathematics
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Ответ:
sirstop
Step-by-step explanation:
Ответ:
a slice of pizza cost $1.25 and a 12-ounce cola cost $0.50.
Step-by-step explanation:
Let slice of pizza cost x and a 12-ounce cola cost y.
Then Sara's order cost: 2x+y=3
and Sydney's order cost: 3x+2y=4.75
From the first equation we have: y=3-2x and put this to the second equation:
3x+2(3-2x)=4.75
3x+6-4x=4.75
x=1.25
y=3-1.25*2=0.50
a slice of pizza cost $1.25 and a 12-ounce cola cost $0.50.