Quadratics and Complex Numbers — Test

Question 1

Which equation represents a graph with a vertex at open paren negative 3 comma 2 close paren ?

Revolt · Accepted Answer

y is equal to 4 x squared plus 24 x plus 38

Question 2

If x squared plus m x plus m is a perfect-square trinomial, which equation must be true?

Revolt · Accepted Answer

x squared plus m x plus m is equal to open paren x minus 1 close paren squared

Question 3

A projectile is fired straight up from ground level with an initial velocity of 112 ft/s. Its height, h , above the ground after t seconds is given by h is equal to negative 16 t squared plus 112 t What is the interval of time during which the projectile's height exceeds 192 feet?

Revolt · Accepted Answer

3 is less than t comma t is less than 4

Question 4

In which quadrant is the number 6 minus 8 i located on the complex plane?

Revolt · Accepted Answer

IV

Question 5

The graph shows the height of a projectile t seconds after it is launched. If acceleration due to gravity is negative 16 the fraction with numerator ft and denominator s squared , which equation models the height of the projectile correctly? h of t is equal to A t squared plus v t plus h sub 0

Revolt · Accepted Answer

h of t is equal to negative 16 t squared plus 32 t plus 5

Quadratics and Complex Numbers — Test Answers

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