The Quadratic Formula

Question 1

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

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/EVresources/3111-03-08-20-01-task/mc001-3.jpg

Question 2

0 = 5x2 - 2x + 6

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/EVresources/3111-03-08-20-03-task/mc002-3.jpg

Question 3

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

Revolt · Accepted Answer

✔ C

Question 4

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

Revolt · Accepted Answer

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

Question 5

3x = 0.5x2

Revolt · Accepted Answer

x = 0 or x = 6

Question 6

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

t 0.87 s

Question 7

Question 7

Revolt · Accepted Answer

real solution(s): no; real solution(s): two; real solution(s): one

Question 8

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

Revolt · Accepted Answer

✔ no; real solution(s): no; real solution(s): two; real solution(s): one

Question 9

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

Revolt · Accepted Answer

✔ no

Question 10

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

Revolt · Accepted Answer

✔ B; has one real root.: B; has a negative discriminant.: A; has an equation with coefficients: C

The Quadratic Formula Answers

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