noah2o2o
02.06.2020 •
Mathematics
A glass is
1
4
full. Then 70cm3 of orange juice is poured in.
The glass is now
3
5
full. What is the total volume of the glass?
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Ответ:
they sell 240 sw =)))
Step-by-step explanation:
x= the number of b water they sold
y= the number of sw they sold
because they sold a total of 390 items => x+y= 390 (1)
because they sold water for $2 a bottle and the sandwiches for $4 each => 2x + 4y= 1260 (2)
(1) and (2) => x=150 ; y=240.
i hope this will help you =)))