andrejr0330jr
17.09.2019 •
Mathematics
Jeremy needs to buy soccer supplies for his team. while shopping, he finds a 3-pack of shin guards plus 2 soccer balls on sale for $48.97. he later finds a 5-pack of shin guards and 3 soccer balls on sale for $76.45. the representative equations are given below, where x is the cost of each pack of shin guards, and y is the cost of each soccer ball. excluding taxes, what is the cost of one soccer ball?
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Ответ:
5x + 3y = 76.45 ...multiply by -3
15x + 10y = 244.85 (result of multiplying by 5)
-15x - 9y = - 229.35 (result of multiplying by -3)
add
y = 15.50 <=== cost of a soccer ball
shin guards cost : 5.99
Ответ:
I answered C for that question.