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2 years ago

10

bananas are on sale for $0.40 a pound and you have a coupon for $0.25 off your total purchase. write a function rule for the cos

t of n pounds. how much would 30 pounds of bananas cost?

1 answer:

Serggg [28]2 years ago

8 0

Your answer is
(n)=0.4n-.025;$11.75

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Answer:

vertex = (0, -4)

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Step-by-step explanation:

Given:

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$\begin{aligned}\textsf{At}\:(-2,8) \implies a(-2-h)^2+k &=8\\a(4+4h+h^2)+k &=8\\4a+4ah+ah^2+k &=8\\\implies 4a+4ah-4&=8\\4a(1+h)&=12\\a(1+h)&=3\end{aligned}$

Substitute point (1, -1) and $ah^2+k=-4$ into the equation:

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Therefore, the equation of the parabola in vertex form is:

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