1-31-22 Quad Practice Problems

What are the x-int's for f(x)=x² + 2x - 15

• (0,5), (0,3)

• (0,5), (0,-3)

• (5,0), (-3,0)

• (-5,0), (3,0)

Which is a common factor of x² -9 and x² -5x + 6

• x + 3

• x - 3

• x - 2

• x²

Equivalent to 9x² - 16

• (3x - 4)²

• (9x - 4) (9x + 4)

• (3x - 8) (3x +8)

• (3x - 4) (3x + 4)

Name the Zeros for the solution x⁴ - 4 = 0.

• x = -4 and x = 4

• x = -2 and x = 2

• x = 0 and x = -4

• x = 4 and x = 2

What is the range of the function f(x) = -3x² + 5

• All real numbers less than or equal to 5

• All real numbers greater than or equal to 5

• All nonnegative real numbers

• All nonnegative integers

Rewrite the expression 81x⁴ - 1

• (9x)² - (1)²

• (9x²)² - (1)²

• (9x)⁴ - (1)²

• (9x)⁴ - (1)⁴

Give me the Vertex and the Axis of Symmetry

y = x² - 16x + 63

• vertex: (8, -1); axis of symmetry: x = 8

• vertex: (8, 1); axis of symmetry: x = 8

• vertex: (-8, 1); axis of symmetry: x = -8

• vertex: (-8, -1); axis of symmetry: x = -8

What's the end behavior f(x) = -0.5x² - 3x - 4

• as x increases, f(x) increases;

  as x decreases, f(x) decreases

• as x increases, f(x) decreases;

  as x decreases, f(x) decreases

• as x increases, f(x) increases;

  as x decreases, f(x) increases

• as x increases, f(x) decreases;

  as x decreases, f(x) increases

Which two (2) of the following statements are TRUE?

• The object is projected from the ground.

• The flight is symmetric about the line t = 10.

• The object reaches a maximum height of 12 feet.

• The object is flying in the air during the interval 0 < t < 25.93.

• The object reaches its maximum height at 12 seconds of flight.

Which of the following is not true about the parabola shown?

• no roots

• the y-intercept is (0,7)

• the vertex is (1,3)

• x is all real numbers