You'll have to convert the equation from x-int to standard form (ax² + by + c), and then convert it to vertex form (y = a(x - h)²<span> + </span><span>k)</span>
6.9
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Answer:
x = 0
Step-by-step explanation:
They had $80 then they cut the price. so 216-80=136
136/2=68
68+20=88
they sold 88 tickets