The Quadratic Formula

Question 1

The height h (in feet) of an object t seconds after it is dropped can be modeled by the quadratic equation h = -16t2 + h0, where h0 is the initial height of the object. Suppose a small rock dislodges from a ledge that is 255 ft above a canyon floor. Solve the equation h = -16t2 + 255 for t, using the quadratic formula to determine the time it takes the rock to reach the canyon floor.

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A: t 0.87 s

Question 2

y = 12x2 - 9x + 4✔ noonetwo real solution(s)

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A: ✔ no

Question 3

Question 3

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has one real root.: B; has an equation with coefficients: C

Question 4

Complete the statements.Graph A✔ BC has one real root.

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B: ✔ B

Question 5

Step 1: ax2 + bx + c = 0

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Step 6:: A

Question 6

Which of the following did you include in your response? Check all of the boxes that apply.

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B: The 64 should have been added.

Question 7

10x + y = -x2 + 2 noone✔ two real solution(s)

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C: ✔ two

Question 8

4y - 7 = 5x2 - x + 2 + 3y✔ noonetwo real solution(s)

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A: ✔ no

Question 9

Graph AB✔ C has an equation with coefficientsa = 1, b = 4, c = -2

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C: ✔ C

Question 10

✔ ABCD

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A: ✔ A

The Quadratic Formula Answers

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