AnswersCA-Common Core Math II A-CRModeling with Quadratic Equations

Modeling with Quadratic Equations — Unit test Answers

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1
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What is the vertex of f(x) = |x + 8| – 3?

A
(–8, –3)
B
(–8, 3)
C
(8, –3)
D
(8, 3)
2
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Which of the following is the graph of translated 2 units right, 2 units up, and dilated by a factor of ?

Question illustration
A
mc018-3.jpg
Option A
B
mc018-4.jpg
Option B
C
mc018-5.jpg
Option C
D
mc018-6.jpg
Option D
3

Which function has a vertex at (2, 6)?

A
f(x) = 2|x – 2| – 6
B
f(x) = 2|x – 2| + 6
C
f(x) = 2|x + 2| + 6
D
f(x) = 2|x + 2| – 6
4

Given the function f(x) = 2|x + 6| – 4, for what values of x is f(x) = 6?

A
x = –1, x = 11
B
x = –1, x = –11
C
x = 14, x = –26
D
x = 26, x = –14
5

Given the function f(x) = 0.5|x – 4| – 3, for what values of x is f(x) = 7?

A
x = –24, x = 16
B
x = –16, x = 24
C
x = –1, x = 9
D
x = 1, x = –9
6

The standard diameter of a golf ball is 42.67 mm. A golf ball factory does quality control on the balls it manufactures. Golf balls are randomly measured to ensure the correct size. One day, an inspector decides to stop production if the discrepancy in diameter is more than 0.002 mm. What is the range of acceptable values?

A
42.668 mm to 42.670 mm
B
42.668 mm to 42.672 mm
C
42.670 mm to 42.672 mm
D
42.670 mm to 42.674 mm
7

Which of the following is the graph of f(x) = –0.5|x + 3| –2?

A
mc016-1.jpg
Option A
B
mc016-2.jpg
Option B
C
mc016-3.jpg
Option C
D
mc016-4.jpg
Option D
8

The standard form of an absolute value function is . Which of the following represents the vertex?

Question illustration
A
mc002-2.jpg
Option A
B
mc002-3.jpg
Option B
C
mc002-4.jpg
Option C
D
mc002-5.jpg
Option D
9

What is the domain of the absolute value function below?

Question illustration
A
x –4
Option A
B
x 2
Option B
C
mc010-4.jpg
Option C
D
mc010-5.jpg
Option D
10

What is the vertex of the absolute value function below?

Question illustration
A
(–3, –2)
B
(–3, 2)
C
(2, –3)
D
(2, 3)

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