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

How many roots will the equation: -4x^2  - 12x + 4= 1 have?

• 1
• 2
• 3
• none

Tags

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

Solve by taking square roots:
k² - 6 = 43

• k = √37
• k = 37 or - 37
• k = 7, k = -7
• no solution

Tags

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

What are the solution(s) for the following equation?
f(x)= 3x²-12
Hint: You don't have to factor...

• x=4,2
• x=-4, 2
• x=2, -2
• x=-2

Tags

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

Solve by completing the square. Round.
x² -4x = 5

• 11 and -7
• 1 and 3
• 1.73 and -1.73
• 5 and -1

Tags

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

How fast would you reach the water if you jump of a cliff using the formula:    h(t) = -16t² + 8t + 24?

• 8
• 1
• 1.5
• 1/4

Tags

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

If a toy rocket is launched vertically upward from ground level with an initial velocity of 128 feet per second, then its height h after t seconds is given by the equation
h(t) = -16t² +128t  
When will the object reach its maximum height?

• 4 ft
• 0 seconds
• 0 ft
• 4 seconds

Tags

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

What is the vertex of y=x²+4x-6?

• (-2,0)
• (-2,-10)
• (2,-6)
• (2,6)

Tags

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

Solve the equation using the zero product property.

3x(2x - 4) = 0

• x = -1/3 or x = -2

• x = 0 or x = 2

• x = 0 or x = -2

• x = -1/3 or x = 2

Tags

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

2 For the function below, is the discriminant positive, negative, or zero?

y = x² + 4x + 4

• Positive

• Negative

• Zero

Tags

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

Solve.

4x² + 11x - 3 = 0

• x = -3/4 and x = -1

• x = 4 and x = 3

• x = 1/4 and x = -3

• x = -1/4 and x = 3

Tags

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