Unit 4

Solve the following linear polynomial equation: 2𝑥−5=7.

• x=6

• x=8

• x=6.5

• x=10

Tags

CCSS.7.EE.B.4A

A ball is thrown into the air with an initial velocity of 2 meters per second. The height of the ball (in meters) can be modeled by the quadratic function ℎ(𝑡) = −2𝑡² + 20𝑡 + 6, where t represents time in seconds. Determine the maximum height the ball reaches and the time it takes to reach that height.

•                In 5 seconds, the ball will be at a max height of 56 meters

•            In 5 seconds, the ball will be at a max height of 56 meters

• In -0.29 seconds, the ball will be at a max height of 56 meters

• In 20 seconds, the ball will be at a max height of 56 meters

Which quadratic function has the highest degree?

• y=x³+8x²+12

• y=x⁵-5x⁴+2

• y=x⁷+9x-6

• y=-2x²+x-9 

Name the polynomial by degree and number of terms.

    y=x³+8x²+12

• quartic trinomial

• quadratic trinomial

• cubic trinomial

• constant monomial

What is the axis of symmetry of a quadratic function?

• The x-intercept of the function

• The y-intercept of the function

• The line that divides the parabola into two symmetric halves

• The maximum or minimum point of the function 

Is 3x²+2x-1 increasing or decreasing?

• Increasing

• Decreasing

You are designing a roller coaster for an amusement park. The highest point of the roller coaster needs to be at a maximum height of 150 feet, and the vertex of the parabolic path is at a point (10, 150).  Which form of the quadratic equation represents the height of the parabolic path?

• Y=(x+10)²+150

• Y=(x+150)²-10

• Y=(x-10)²+150

• Y=-(x-10)²+150