isabella4141
22.11.2019 •
Mathematics
Students are going on a field
trip. a total of 8 vehicles will be
needed for 80 students. each
bus holds 13 students and vans
hold 5 students. find how many
buses and vans were taken.
Solved
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Ответ:
5 buses and 3 vans were taken.
Step-by-step explanation:
x+y=8
13x+5y=80
x=8-y
13(8-y)+5y=80
104-13y+5y=80
104-8y=80
8y=104-80
8y=24
y=24/8
y=3
x+3=8
x=8-3=5
x=5, y=3. (5, 3)
5 buses and 3 vans were taken.
Ответ:
Volume of a cube is s×s×s
hence 7 cube=343
343 is the answer. Hope this helps you. Good luck^_^