The Quadratic Formula

Question 1

Choose the equation that represents the solutions of 0 = 0.25x2 - 8x.

Revolt · Accepted Answer

C:

Question 2

Which of the statements about the following quadratic equation is true? 6x2 - 8 = 4x2 + 7x

Revolt · Accepted Answer

A: The discriminant is greater than zero, so there are two real roots.

Question 3

3x = 0.5x2

Revolt · Accepted Answer

D: x = 0 or x = 6

Question 4

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.

Revolt · Accepted Answer

A: t 0.87 s

Question 5

Question 5

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

Question 6

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

Revolt · Accepted Answer

B: ✔ B

Question 7

0 = 5x2 - 2x + 6

Revolt · Accepted Answer

C:

Question 8

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

Revolt · Accepted Answer

B: The 64 should have been added.

Question 9

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

Revolt · Accepted Answer

C: ✔ C

The Quadratic Formula Answers

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