Application Quadratic Formula

If each mark on the x-axis represents one second, when did the object reach the ground?

• 2.5 seconds

• 6 seconds

• 5.5 seconds

• 5 seconds

A ball is thrown into the air with an upward velocity of 100 ft/s. Its height, h, after t seconds is given by the function
 h = -16t² + 64t + 960.
How many seconds did it take for the ball to reach its maximum height?

• 10 seconds

• 64 seconds

• 960 seconds

• 2 seconds

Use the quadratic formula to find the solutions for
y = -x² - 5x + 12

• -4.9 and -0.1

• -8.54 and 8.54

• -0.45 and 3.55

• -6.77 and 1.77

Solve Using the Quadratic Formula
 x² + 4x - 40 = -8

• -10 & -4

• -4 & 10

• -8 & 4

• 8 & -4

Solve Using the Quadratic Formula 
2x² + 7x - 15 = 0

• -1.5 or 5

• No Solution

• -5 or 1.5

• 0.7 or 5

Identify the 'c' value: y = 16x² -8x -24

• 16

• -8

• 24

• -24

Find the roots of the quadratic equation 2s² = 50.

• s = 25 and s = -25

• s = 5 and s = -5

• s = 5 and s = 25

• s = -5 and s= -25

What equation has the roots of x = 7 and x = -7?

• x² - 14 = 0

• x² - 49 = 0

• x² + 49 = 0

• x² = 14

What are the roots of the quadratic equation 3t² = 12?

• t =4 and t = -4

• t = 2 and t = -2

• t = 3 and t = -3

• t = 9 and t = -9

Solve using the Quadratic Formula:
x² + 4x + 3 = 0

• x = 1 and x = 3

• x = 6 and x = -2

• x = -1 and x = -3