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

Solve for the values of x:
(x - 3)(x + 6) = 0

• { -3, -6 }
• { 3, -6 }
• { -3, -6 }
• { 3, 6 }

Tags

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

Find the vertex.
y = 2x² - 8x + 9

• (1,2)
• (2, 33)
• (2,1)
• (33, -2)

Tags

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

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.
What is the maximum height?

• 960 feet
• 1008 feet
• 1024 feet
• 1152 feet

Tags

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

If the discriminant is negative, then the quadratic has:

• 1 Real Solution
• 2 Real Solutions
• Half a Solution
• 2 Imaginary Solutions

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

What should you do first in solving this equation?
x² + 6x - 13 = 3

• Get factored form
• Find two numbers which add to make 6 and multiply to make -13
• Make it equal 0 by subtracting 3 on each side
• Type it all in a calculator.

Tags

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

What do you know about the 'a' value?

• Negative

• Nothing

• Positive

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

A lizard is jumping across the water in search of food. The equation h = -12t² + 6t models the lizard's height in feet above the water t seconds after he jumps. How long after jumping is he back on the water?

• 0.1 seconds

• 0.25 seconds

• 0.50 seconds

• 0.75 seconds

• 1 second

Tags

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

What method would you use to solve $x^2-16=0$   

• Factoring Method

• Completing the Square Method

• Quadratic Formula

• Square Root Method

Tags

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

Why are quadratic equations set equal to zero?

• Because zero is an easy number to work with.

• Because we are trying to find the x-intercepts and that happens when y=0.

• Because setting it equal to zero helps us find the y-intercepts.

• None of the above

Tags

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

What are the final solutions for  $x\ =\frac{-2\pm\sqrt{100}}{4}$  ?

•  $x\ =\ \frac{1}{2},\ x\ =\ -\frac{1}{3}$  

•  $x=-2,\ x\ =\ 3$  

•  $x=-3,\ x=2$  

•  $x\ =\ -\frac{1}{2},\ x\ =\ \frac{1}{3}$  

Tags

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