Word Problems and Polynomial Operations

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

David is running a concession stand at a soccer game. He sells nachos and sodas. Nachos cost $1.50 each and sodas cost $0.50 each. At the end of the game, David made a total of $78.50 and sold a total of 87 nachos and sodas combined. Which system of equations represents this situation?

• 1.5x+0.5y=78.5
  x+y=87
• 1.5x+0.5y=78.5
  1.5x+0.5y=87
• x+y=78.5
  1.5x+0.5y=87
• x+y=78.5
  x+y=87

Tags

CCSS.HSA.CED.A.3

Tags

CCSS.HSA.APR.A.1

Add the polynomials.

(3x³ + 3x² – 4x + 5) + (x³ – 2x² + x – 4)

• 4x³ + 1x² – 3x + 1

• 6x³ + 1x - 1x² - 3

• 2x³ + 1x² - 5x + 9

• 3x⁵ +1x - 1x⁵ - 3x

Tags

CCSS.HSA.APR.A.1

• Rational

• Irrational

What is the solution of the equation?

• 14

• - 28

• 28

• 0

Classify by the DEGREE:
4x³ - 5x² + 2x - 1

• Degree of 1
• Degree of 2
• Degree of 3
• Degree of 4

Q. What is the y-intercept of the line that passes through the points (4,-2) and (20,2)?

• 1/4

• -3

• -2

• 4

• Cannot be determined

Which statement represents a real life situation that can be modeled by a linear function?

• A virus doubles every 3 hours

• Money in an investment account increases by 3% every year

• The speed a roller coaster goes through the whole ride

• The length your hair grows daily in .001 inches.

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

An airplane 30,000 feet above the ground begins descending at a rate of 2,000 feet per minute. Write an equation to model the situation.

• y = - 2,000x + 30,000

• y = - 2,000x - 30,000

• y = 30,000x + 2,000

• y = -30,000x + 2,000