Quadratic Equations Review

• The annual profit will be at a maximum if each model car set costs $25.

• The annual profit will be 0 if each train set costs $20.

• The annual profit will be at a maximum if each model car set costs $15.

• The maximum annual profit is $25,000.

• The annual profit will be 0 if each model car set is $25.

• x = -1/8

• x = 8

• x = -8

• x = 1/8

• No, because the solutions to the first equation are x = 12 and x = -4, and the solutions to the second equation are x = -12 and x = 4.

• Yes, because the solutions to both equations are x = -12 and x = 4.

• Yes, because the solutions to both are x=12 and x = -4.

• No, because the solutions to the first equation are x = -12 and x = 4, and the solutions to the second equation are x = 12 and x = -4.

Mathematical Equivalence

ON

Which are equivalent expressions?

For each expression shown in the picture, choose the equivalent expression.

Groups:

(a) Expression A

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(b) Expression B

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(c) Expression C

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• The softball reaches a maximum height of 92 feet.

• The softball hits the ground after 1.5 seconds.

• The softball was thrown from the ground.

• The softball reaches a maximum height of 56 feet.

• The football is 10 meters high after 1 second.

• The maximum height of the football is 31.6 meters.

• The football reaches its maximum height after 5 seconds.

• The football hits the ground after 10 seconds.

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