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

If a ball if thrown into the air is represented by the function
h(t) = -16t²+80t, where t represents the time in seconds and h(t) is the height of the ball in feet. Find the time it will take to reach its maximum height. 

• 8 mins
• 2.5 seconds
• 5 seconds
• 604 seconds

Tags

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

Factor
k² -2k - 24

• (k+4)(k-6)
• (k+4)(k+6)
• (k+6)(k-1)
• (k-4)(k+6)

Tags

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

Determine the values of
a, b, and c for
the quadratic equation: 
4x² – 8x = 3

• a = 4, b = -8, c = 3
• a = 4, b =-8, c =-3
• a = 4, b = 8, c = 3
• a = 4, b = 8, c = -3

Tags

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

What is the degree classification of this polynomial?
x²+4x-8

• binomial
• trinomial
• quadratic
• cubic

Tags

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

What is another name for the x-intercepts of a quadratic?

• y-intercepts
• zeros
• x-axis
• none of these

Tags

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

Find the vertex  y = x² - 2x - 5

• V(-2, 10)
• V(-1, 15)
• V(1, -6)
• V(1, -12)

Tags

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

In order to find the vertex of an in standard form, the first two steps are to use the equation _____ to find the x value, and then you can plug that value back into the equation to find the _____.

• -b/2a, y-value
• (x-h)^2, y-intercept
  
• (x-r1), solution
• ax^2, vertex

Tags

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

Factor completely: x²-13x+40

• (x-5)(x-8)
• (x+5)(x+8)
• (x-4)(x-10)
• (x-2)(x-20)

Tags

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

Solve using square roots.
7b² - 4 = 59

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

Tags

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

Find the vertex of 
f(x) = -x² - 4x + 12.

• (-2, 16)
• (2, 0)
• (2, 4)
• (-2, 4)

Tags

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