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06-11-2016
Mathematics

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adult tickets for a play cost $5.50 and a child ticket cost $3.50. They sold 550 tickets and collected $2139.00. How many adult tickets sold

Respuesta :

06-11-2016

x = 5.5
y = 3.5
5.5x + 3.5y = 2139______×1
x + y = 550_______×3.5

5.5x + 3.5y = 2139
(-) 3.5x + 3.5y = 1925
______________
2.0x = 214
x = 107 (adult)

107 + y = 550
y = 443 (child)

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