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13.07.2019 •
Mathematics
So far a total of 48 tickets have been sold for the school play for a total revenue of $220. how many student tickets have been sold? set up and solve a system of equations to solve the problem.
adult = $7
student=$3
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Ответ:
From the first sentence we can set up both equations:
1) x + y = 48
2) 7x + 3y = 220
Rearrange #1 to isolate x:
x = 48 - y
Sub that into #2 and solve for y to get your
7(48 - y) + 3y = 220
336 - 7y + 3y = 220
-4y = -116
y = 29
29 student tickets were sold.
Ответ:
B. Line RS is parallel to line R'S'.
Step-by-step explanation: