Unit Test — Cumulative exam Answers
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21
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A researcher wants to survey people from different age groups to analyze voting patterns. Which type of survey will best accomplish this goal?
A
systematic random samplingB
voluntary samplingC
convenience samplingD
stratified sampling22
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Henry is asked to find the exact value of . His steps are shown below.1. Subtract from as many times as possible: – = 2. Find the reference angle for : – = .3. The cosine value for is .4. The cosine value is positive because is in the first quadrant.Which of the following describes Henry’s errors?
A
The reference angle should be , and the sign of the value should be negative.
B
The reference angle should be , and the cosine value for is .
C
The sign of the value should be negative, and the reference angle and quadrant should be determined by subtracting in the first step.
D
The cosine value for is , and the reference angle and quadrant should be determined by subtracting in the first step.
23
What is the following product?
A
6 StartRoot 2 EndRoot minus 2 StartRoot 30 EndRoot + 6 minus 2 StartRoot 15 EndRoot
B
6 StartRoot 3 EndRoot minus 6 StartRoot 5 EndRoot
C
3 StartRoot 2 EndRoot minus StartRoot 22 EndRoot + 2 StartRoot 3 EndRoot minus 4
D
2 StartRoot 3 EndRoot + 6 minus 2 StartRoot 15 EndRoot
24
Which expression is equivalent to ?
A
log Subscript 2 Baseline 9 + 3 log Subscript 2 Baseline x
B
log Subscript 2 Baseline x + 3 log Subscript 2 Baseline 9
C
3 log Subscript 2 Baseline x minus log Subscript 2 Baseline 9
D
3 log Subscript 2 Baseline 9 minus log Subscript 2 Baseline x
25
Given the function f(x) = –5|x + 1| + 3, for what values of x is f(x) = –12?
A
x = –2, x = –4B
x = –2, x = 4C
x = 2, x = –4D
x = 2, x = 4Did you find these answers helpful?
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