Mike went to a football game with his family. They bought 5 boxes of popcorn and 3 programs, and spent $41. Sean's family went to the same game, bought 3 boxes of popcorn and 2 programs, and spent $26. How much does each program cost at the game? (1 point) $4 $5 $6 $7
Let the price of a box of popcorn = b and the price of a program = p
we can make 2 equations:
5b+3p = 41 and 3b+2p=26
We can use the subtraction method be able to eliminate one of the variables and isolate the other one - to do it I will equalize the 'b' in both equations by multiplying by 5 and 3 respectively
5(3b+2p=26)
-3(5b+3p = 41)
15b+10p=130
-(15b+9p=123)
p=7 (therefore the answer is 7$)
The cost of each program in the game, given the data is $7
5b + 3p = 41 (1)
3b + 2p = 26 (2)
Make b the subject in equation (1)
5b + 3p = 41
5b = 41 - 3p
b = (41 - 3p) / 5 (3)
Substitute the value of b in equation (3) into equation (2)
3b + 2p = 26
3[(41 - 3p) / 5] + 2p = 26
(123 - 9p) / 5 + 2p = 26
Multiply through by 5
123 - 9p + 10p = 130
123 + p = 130
Collect like term
p = 130 - 123
p = $7
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