Solving Quadratics Using Any Method

A ball is thrown into the air with an upward velocity of 40ft/s. Its height h in feet after t seconds is given by the function :

h(t) = -16t² + 40t + 10

How many seconds does it take the ball to reach its maximum height?

• 1.25 seconds

• 1.4 seconds

• 2.5 seconds

• 2 seconds

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

The profit from selling local ballet tickets depends on the ticket price. Using past receipts, we find that the profit can be modeled by the function: p= -15x² +600x +60 What is the maximum profit you can make from selling tickets?

• $6060

• $20

• $600

• $10,250

Rafael drops a ball from a third-story window. This equation represents the approximate height, h, in meters, of the ball above the ground after it falls for t seconds. When is the ball at ground level?

• only at t = 0 seconds

• only at t = 3 seconds

• only at t = 9 seconds

• at both t = 0 seconds and t = 3 seconds

When using the Quadratic Formula method, what are a, b, and c for the equation: 9x²-x= 0?

• a=9, b = -1, c =0

• a=1, b = 0, c =0

• a=9, b = 0, c =0

• a=9, b = 1, c =0

Tags

CCSS.HSA-REI.B.4B

Which of the following cannot be solved with the Square Root method?

• x²-9=0

• x²-15=0

• x²-9x=0

• 6x²-15=0

Tags

CCSS.HSA-REI.B.4B

When using the Completing the Squares method, what number would fill in the blank:

x²+12x ______ = 8 + _______

• 6

• 36

• 12

• 16

Tags

CCSS.HSA-REI.B.4B

Solve by ANY method you have learned: x² − 2x - 11=0

Tags

CCSS.HSA-REI.B.4B

Which TWO methods could be used to solve this equation?

x² - 3x - 54 = 0

• Square Root Method

• Factor Method

• Complete the Square

• Quadratic Formula

Tags

CCSS.HSA-REI.B.4B

Which TWO methods could be used to solve this equation? x² + 2x = -9

• Square Root Method

• Factor Method

• Complete the Square

• Quadratic Formula

Tags

CCSS.HSA-REI.B.4B