Math 2 Solid - CW Review.4

What is the length of the latus rectum of the equation

y = 2x² - 4x + 7?

• 1/8 unit

• 1/2 unit

• 1 unit

• 2 units

What is the axis of symmetry of y=2x²-4x+9?

• x = 1
• x = -1
• x = -2
• x = 4

Tags

CCSS.HSA.REI.B.4

How many and what type of roots does this graph have?

• no real roots

• one real root

• two real roots

• two complex (not real) roots

Determine the domain and range of the function

• Domain: (-∞, ∞), Range: (-∞, ∞)

• Domain: [-4, ∞), Range: (-∞, ∞)

• Domain: (-∞, ∞), Range: (-4, ∞)

• Domain: (-∞, ∞), Range: [-4, ∞)

What are the intervals of increase and decrease for this graph?

• Increase: (-∞, -4); Decrease: (-4, ∞)

• Decrease: (-∞, -4); Increase: (-4, ∞)

• Increase: (-∞, 2); Decrease: (2, ∞)

• Decrease: (-∞, 2); Increase: (2, ∞)

What equation is graphed?

• y = -x² - 3x - 3

• y = x² - 2x - 3

• y = 2x² - 3x - 3

• y = x² +2x - 3

• y = 2x² +3x - 3

A parabola has a vertex of (2, 3) and a focus of (2, 4). What is its directrix?

• (2, 2)

• x = 2

• y = 2

• (2, 3.5)

A parabola has a focus of (-4, 5) and a directrix of y = 9. What is its vertex?

• (-4, 7)

• (2.5, 5)

• (-4, 1)

• (-4, 5.25)

Simplify the expression.
-3x²( 7x² - x + 4)

• -21x⁴ + 3x³ -12x²
• 7x² - x + 4 (-3x²)
• 21x⁴ + 3x³ + 12x²
• -12x² + 3x³ -21x⁴

Tags

CCSS.HSA.APR.A.1

Simplify the expression.
(4n⁴-8n+4) - (8n²+4n⁴+1)

• -8n² - 8n + 3 
• -7n² - 8n + 3 
• -6n² - 8n + 3
• -7n² - 4n + 3

Tags

CCSS.HSA.APR.A.1