Robert M. answered • 02/17/15
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5
(1)
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Senior tickets (x)
Child tickets (y)
First day: 3x + 5y = 70
second day: 12x + 12y = 216
Solve the system of equations (use elimination)
Multiply first equation by -4 -4(3x + 5y = 70), which makes it
-12x - 20y = -280
(+)12x + 12y = 216 add to second equation
-8y = -64
divide by -8. y = 8
Plugin the y value to either equation ( I will choose first equation)
3x + 5(8) =70
3x+ 40 = 70
3x = 30
x = 10
Senior tickets are $10, child tickets are $8
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Kayla's school is selling tickets to the annual dance competition. The adult tickets are $8.50. The children's tickets are $5.50. The school sold a total of 75 tickets for a total price of $532.50. How many adult tickets did they sell?
Report
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