CCSS.Math.Content.HSA.REI.B.4

Solve by taking square roots:
5b² - 4 = 41

• b = 9, b = -9
• b = 3, b = -3
• b = 8, b = -8
• no solution

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CCSS.Math.Content.HSA.REI.B.4

What is the axis of symmetry?

• x = - 4
• x = - 2
• x = 0
• x = 4

Tags

CCSS.Math.Content.HSA.REI.B.4

ax²+bx+c=0  is the standard form of a quadratic equation.

• True
• False

Tags

CCSS.Math.Content.HSA.REI.B.4

Solve by completing the square.
y² + 10y = -9

• 1 and -12
• -1 and -9
• 1 and -9
• 1 and -1

Tags

CCSS.Math.Content.HSA.REI.B.4

Solve on the domain [0, 2π)
cos² x + sin x + 1 = 0

• π
• 3π/2
• π/6, 5π/6, 3π/2
• No solution

Tags

CCSS.Math.Content.HSA.REI.B.4

Pedro throws a ball upward at a rate of 20 meters per second from an initial height of 4 meters. The height of the ball above the ground can be approximated by the equation below, where t represents the amount of time in seconds since the ball has been released. 
h= -5t²+20t+4
After how many seconds does the ball reach its maximum height?

• 0 seconds
• 4 seconds 
• 22 seconds
• 2 seconds

Tags

CCSS.Math.Content.HSA.REI.B.4

Use the quadratic formula to find the solutions for
y = 2x² - 9x + 5

• -8.14 and -6.14
• 4.07 and 3.07
• 3.85 and 0.65
• ZERO solutions

Tags

CCSS.Math.Content.HSA.REI.B.4

Use the quadratic formula to find the solutions for

y = -x² - 5x + 12

• No Real Solution

• 
• 
• 

Tags

CCSS.Math.Content.HSA.REI.B.4

The area of a rectangular pool table is: x² + 14x +40.

The length is x + 4. What is the width?

• x + 8

• x + 14

• x + 10

• x +4

Tags

CCSS.Math.Content.HSA.REI.B.4

Solve by factoring:
 $x^2-36=0$ 

•  $x=\pm6$  

•  $x=\pm36$  

•  $x=\pm18$  

• No real solutions

Tags

CCSS.Math.Content.HSA.REI.B.4