Composition of Functions and Modeling — Unit test Answers
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21
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What is the solution of log2 (3x - 7) = 3?
A
One-third
B
4C
5D
Sixteen-thirds
22
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How many integers satisfy the inequality (x 2 – 4)(x 2 – 10) < 0?
A
noneB
twoC
fourD
an infinite number23
What is the solution to x 3 + 4x 2 > x + 4?
A
–4 < x < –1B
–4 < x < 1C
–4 1D
x < –4 or –1 < x < 124
What is the solution to (x + 2)(x – 3)2 > 0?
A
A number line going from negative 4 to 4. The entire line is shaded with arrows going left and right.
B
A number line going from negative 4 to 4. An open circle is at negative 2. The line is shaded to the right of negative 2.
C
A number line going from negative 4 to 4. Open circles are at negative 2 and 3. The line is shaded between negative 2 and 3.
D
A number line going from negative 4 to 4. Open circles are at negative 2 and 3. The line is shaded to the right of negative 2.
25
Which expression is equivalent to ?
A
log Subscript 3 Baseline c + log Subscript 3 Baseline (9)
B
log Subscript 3 Baseline (9) + log Subscript 3 Baseline (c)
C
log Subscript 3 Baseline c minus log Subscript 3 Baseline (9)
D
log Subscript 3 Baseline (9) minus log Subscript 3 Baseline (c)
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