Math Functions

What should you do first to solve this equation using quadratic formula? x² + 6x - 13 = 3

• Get factored form

• Write down: a=1, b=6, c=-13

• Make it equal 0 by subtracting 3 on each side

• Type it all in a calculator.

Does this function have a maximum or minimum?

• maximum

• minimum

Which is the vertex of y = x²+ 16x + 71 ?

• V(-8, 7)

• V(-8, 3)

• V(8, 10)

• V(16, -2)

What do we call the graph of a quadratic function?

• parabola

• linear

• cubic

• sinusoidal

What are the zeros of the parabola? 

• 1, 5

• 3, -5 

• 3, 0

• -6, 1

Find the roots of the equation: x²+3x-10

• 1,9

• 5,-2

• 3,-8

• -5,2

How many zeros does this parabola have? 

• 3

• 2

• 0

• 1

The height of a water balloon that is launched into the air is given by h(t) = -5x²+20x+25. When will the balloon explode on the ground?

• 5 seconds

• 1 second

• 2 seconds

• 3 seconds

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

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.

• Yes, because each x-value has only one y-value paired with it.

• No, because the x-value 11 has two y-values pair with it.

• No, because each x-value has only one y-value paired with it.