Math I Quadratics Review

Members of the math club launch a model rocket from ground level with an initial velocity of 96 ft/sec.  This can be modeled with the function h(t) = -16t² + 96t.  When does the maximum height occur?

• 6 seconds

• 3 seconds

• 145 seconds

• 160 seconds

A ball is thrown vertically into the air.  Its height in feet after t seconds is given by the equation h(t) = –5t² + 20t, and is graphed below.  How high will the balloon be after 3 seconds?

• 20 ft

• 15 ft

• 5 ft

• 10 ft

What are the solutions for x2 = -4x - 7?

• A.

• B.

• C.

• D.

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

You are trying to throw a ball over a wire that is 40 feet above the ground.  The height of the ball is modeled by the equation h(t) = -16t² + 48t.  How many seconds will it take to clear the wire?

• sec

• 1.5 sec

• 2 sec

• It won't clear the wire

Solve the equation using any method:

4x²+2x - 6 = 0

• x = 1 & -1.5

• x = -1 & 1.5

• x = (-2 ±√92)/8

• x = (-2 ± √100)/8

Tags

CCSS.HSA-REI.B.4B

Solve:
x² - 49 = 0

• x = -7, x = 7

• x = -7

• x = 7

• x = -7, x = 1

Tags

CCSS.8.EE.A.2

Factor
k² - 2k - 24

• (k+4)(k-6)

• (k+4)(k+6)

• (k+6)(k-1)

• (k-4)(k+6)

x² = 16

• ± 4

• ± 8

• 4

• 8

Tags

CCSS.8.EE.A.2

What are the solutions to this equation? (x-3)(x+2)=0

• x=3,-2

• x=-3,2

• x=2,3

• x=3,2

Tags

CCSS.HSA-REI.B.4B

Solve the equation by graphing:

5x² - 35x + 60 = 0

• x = 3, -4

• x = -3, 4

• x = 3, 4

• x = -3, -4