Critical points on a parabola

What is the vertex of x²+18x+80?

• (9,1)
• (10,8)
• (-9,-1)
• (-10,8)

Find the Vertex:
f(x) = x² + 10x + 21

• (-5,-4)
• (1,10)
• (10,21)
• No Real Solution

What are the zeros of x²+8x+12?

• x= -6 and x= -2
• x= 6 and x=2
• x= -4 and x=-3
• x=4 and x=3

What is the vertex of  x²+10x+24?

• (-5,-1)
• (5,1)
• (6, 4)
• (-6,-4)

What is the vertex of x²+9x+20?

• (4, 5)
• (4, -5)
• (-4.5, -.25)
• (4.5, -.25)

Find the zero's 3x²-3x-10=0

• 2 & -1

• 7 & -3

• 2.39 & -1.39

• 1.46 & -2.46

Find the Vertex:
y = x² + 6x + 2

• (-3,-7)
• (1,6)
• (6,2)
• No Real Solution

What are the zeros of x²+18x+80?

• x=80 and x=1
• x=-10
• x= 8 and x= 10
• x=-8 and x=-10

Which letter in a quadratic formula represents the y-intercept?

• a
• b
• c

For the quadratic y = x² + 4x + 7, What is the y-intercept?

• (0, 7)
• (7, 0)
• (-2, 3)
• (0, 4)