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

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 3

3x = 0.5x2

Revolt · Accepted Answer

x = 0 or x = 6

Question 4

0 = 5x2 - 2x + 6

Revolt · Accepted Answer

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

Question 5

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 4 s

Question 6

Step 1: ax2 + bx + c = 0

Revolt · Accepted Answer

Step 3:: B; Step 5:: D; Step 6:: A; Step 8:: C

Question 7

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 8

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

Revolt · Accepted Answer

✔ two

Question 9

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

Revolt · Accepted Answer

✔ no

Question 10

y = (-x + 4)2no✔ onetwo real solution(s)

Revolt · Accepted Answer

✔ one

The Quadratic Formula Answers

More from this Course

TRY EDGENUITY HACKS