Free Digital SAT Quadratic Functions Practice Questions with Video Explanations

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1. $(x+5)(x-9)=0$

What is the positive solution to the given equation?

A) -9

B) -5

C) 5

D) 9

Question 1 of 3

2. The height $h$ , in feet, of a ball $t$ seconds after it is thrown upward is modeled by the equation $h(t)=-16t^2+80t+6$ . What is the maximum height, in feet, reached by the ball?

A) 86

B) 96

C) 106

D) 126

Question 2 of 3

3. The graphs of the equations $y=x^2-8x+19$ and $y=4x+k$ intersect at exactly one point, where $k$ is a constant. What is the value of $k$ ?

A) -19

B) -17

C) 3

D) 17

Question 3 of 3

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