AnswersCA-Common Core Algebra II A-CRUnit Test

Unit Test — Unit test Answers

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A baseball is thrown into the air from a height of 5 feet. The ball reaches a maximum height of 43.5 feet and spends a total of 3.2 seconds in the air. Which equation models the height of the baseball? Assume that acceleration due to gravity is –16 ft/s2.

A
h(t) = 16t2 + 49.64t + 5
B
h(t) = -16t2 + 5t + 49.64
C
h(t) = -16t2 + 49.64t + 5
D
h(t) = 16t2 + 5t + 49.64
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Which equation has a graph that is a parabola with a vertex at (–2, 0)?

A
y = –2x2
B
y = (x + 2)2
C
y = (x – 2)2
D
y = x2 – 2
23

Which complex number is represented by the point graphed on the complex plane below?

Question illustration
A
–4 + 3i
B
3 + 4i
C
3 – 4i
D
4 + 3i
24

Which equation has the solutions ?

Question illustration
A
x2 + 2x + 4 = 0
B
x2 – 2x + 4 = 0
C
x2 + 2x – 4 = 0
D
x2 – 2x – 4 = 0
25

What is the value of (–7 + 3i) – (2 – 6i)?

A
–9 + 9i
B
–9 – 3i
C
–5 – 3i
D
–5 + 9i

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