AnswersAZ-Common Core Algebra II AUnit Test

Unit Test — Unit test Answers

15 verified answers
1
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The width of a photograph is 4 inches. Tori measures its width using the two rulers, both of which measure in inches. Which statement is true about the accuracy and precision of the rulers?

Question illustration
A
The measurement found using Ruler 1 is more accurate and more precise.
B
The measurement found using Ruler 2 is more accurate and more precise.
C
The measurement found using Ruler 1 is more accurate but less precise.
D
The measurement found using Ruler 1 is more precise but less accurate.
2
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Tinh can row at a rate of 6 mph in still water. It takes her 2 hours to row upstream from a dock to a park. She then rows back to the dock, and it only takes 40 minutes. What is the speed of the river current?

A
3 mph
B
12 mph
C
18 mph
D
48 mph
3

A cashier earns $7 an hour. If x is the number of hours worked, which function represents the cashier’s earnings?

A
y = 7x
B
y = x Superscript 7
Option B
C
y = StartFraction 7 Over x EndFraction
Option C
D
y = 7
Option D
4

Wayne measured the width of a marker tip as 0.012 cm. What is the margin of error?

A
0.007 to 0.017
B
0.011 to 0.013
C
0.0115 to 0.0125
D
0.0125 to 0.0135
5

Kyla measured the weight of a bunch of bananas as 1,100 grams using the scale.

Question illustration
A
1,000 g to 1,200 g
B
1,050 g to 1,150 g
C
1,150 g to 1,200 g
D
1,000 g to 2,000 g
6

The domain of u(x) is the set of all real values except 0 and the domain of v(x) is the set of all real values except 2. What are the restrictions on the domain of ?

Question illustration
A
u(x) 0 and v(x) 2
Option A
B
x 0 and x cannot be any value for which u(x) 2
Option B
C
x 2 and x cannot be any value for which v(x) 0
Option C
D
u(x) 2 and v(x) 0
Option D
7

The height in feet, h, of a model rocket t seconds after launch is given by the equation . The average rate of change in h(t) between t = 1 second and t = 3 second is 6. What does the average rate of change tell you about the rocket?

Question illustration
A
The rocket is traveling six times as fast when t = 3 than it is when t = 1.
B
The rocket is at a greater height when t = 3 than it is when t = 1.
C
The rocket is 6 feet higher above the ground when t = 3 than it is when t = 1.
D
The rocket is traveling at a constant rate of 6 feet per second between t = 1 and t = 3.
8

If f(x) is a linear function, what is the value of n?xf(x)377n9161626.5

A
9
B
11
C
13
D
14
9

If r(x) = 2 – x2 and w(x) = x – 2, what is the range of ?

Question illustration
A
mc016-2.jpg
Option A
B
mc016-3.jpg
Option B
C
mc016-4.jpg
Option C
D
mc016-5.jpg
Option D
10

Which function is the inverse of ?

Question illustration
A
f Superscript negative 1 Baseline (x) = negative one-fifth x + four-fifths
Option A
B
mc014-3.jpg
Option B
C
mc014-4.jpg
Option C
D
mc014-5.jpg
Option D
11

The graph of f(x) is shown below.If g(x) and f(x) are inverse functions, which graph represents g(x)?

Question illustration
A
On a coordinate plane, a curve opens up and to the left in quadrant 1. The curve starts at (0, 0) and curves up sharply through (2, 4).
Option A
B
On a coordinate plane, a curve opens down and to the left in quadrant 2. The curve starts at (0, 0) and gradually curves through (negative 4, 2).
Option B
C
On a coordinate plane, a curve opens open and to the left in quadrant 3. The curve starts at (0, 0) and curves gradually through (negative 4, negative 2).
Option C
D
On a coordinate plane, a curve opens up and to the left in quadrant 1. The curve starts at (0, 0) and curves up through (4, 1).
Option D
12

Which description could be written as a linear function?

A
eight more than twice a number
B
three more than the product of two numbers
C
ten more than the square of a number
D
nine more than one divided by a number
13

Four friends measure the length of a 6-millimeter-long grain of rice. They record their measurements as shown.Andrey:7 mm, 5 mm, 6 mm, 8 mmMariya:7.41 mm, 8.54 mm, 5.12 mm, 6.23 mmYuto:6.1 mm, 5.9 mm, 6.3 mm, 7.2 mmMisaki:5.843 mm, 6.981 mm, 5.334 mm, 7.632 mm

A
Andrey’s
B
Mariya’s
C
Yuto’s
D
Misaki’s
14

If k(x) = 5x – 6, which expression is equivalent to (k + k)(4)?

A
5(4 + 4) – 6
B
5(5(4) – 6) – 6
C
54 – 6 + 54 – 6
D
5(4) – 6 + 5(4) – 6
15

Which graph represents an even function?

A
A coordinate plane has 5 points. The points are (negative 6, negative 4), (negative 4, 2), (2, 4), (4, negative 2), (6, 2).
Option A
B
A coordinate plane has 7 points. The points are (negative 3, negative 6), (negative 2, negative 4), (negative 1, negative 2), (0, 0), (1, 2), (2, 4), (3, 6).
Option B
C
A coordinate plane has 7 points. The points are (negative 5, 2), (negative 4, 1), (negative 3, 3), (negative 2, 5), (2, negative 2), (3, negative 5), (4, negative 6).
Option C
D
A coordinate plane has 7 points. The points are (negative 4, negative 3), (negative 3, negative 5), (negative 2, 1), (0, 0), (2, 1), (3, negative 5), (4, negative 3).
Option D

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