Question

In 2008, a cure for cancer walk sold 21 pink sponsorships and 10 gold sponsorships for a total of $770. In 2009, the walk collected $840 by selling 7 pink sponsorships and 20 gold sponsorships. What is the cost of one pink sponsorship? (5 points)

Answer 1

pink sponsorship cost $20

Answer 2

21p + 10g = 770 ...multiply by -2
7p + 20g = 840
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-42p - 2g = - 1540 (result of multiplying by -2)
7p + 20g = 840
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-35p = - 700
p = -700/-35
p = 20 <=== pink sponsorships cost $ 20 a piece

** the gold ones cost 35 per sponsor