(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).
hope i
Answer from: Quest
the first one is x^2+2x+2
the second one is x^2+4
the last one is x^2-4x+8
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Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1