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03-04-2017
Mathematics

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Morgan sold 500 raffle tickets for a fundraiser. Tickets for children cost $1.50, and tickets for adults cost $2.50. Morgan sold $1100 worth of raffle tickets. How many adult raffle tickets did Morgan sell?
Enter your answer in the box.
[ ]adult tickets

Respuesta :

05-04-2017

1.50c + 2.50a = 1100
c + a = 500

multiply the second equation by -1.50

1.50c + 2.50a = 1100
-1.50c - 1.50a = -7.50

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