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30.01.2020 •
Mathematics
Jim, dora, ada, and kim together placed a total of 60 cupcakes on a tray. jim placed 0.45 of the cupcakes, dora placed 10 of the 60 cupcakes, ada placed 25% of the cupcakes, and kim placed the remaining cupcakes. who placed the most cupcakes?
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Ответ:
Jim placed - 0.45 or 5 cupcakes
Dora placed - 10
Ada placed - 25% or 15
Kim placed the remaining and that is - 30
10 + 5 = 15 and 15 + 15 = 30 so Kim had 30 that means 30 + 30 = 60 cupcakes
Kim is your answer
Ответ:
we have three unknowns and so need three equations
for costs
x+y+z=180
5x+4y+3z=650
for revenue
20x+12y+9z=2100
x+y+z=180
5x+4y+3z=650
x=30
y=50
z=100