Evaluate the expression according to the replacement value given.(x + y) ÷ 3; replace x with 18 and y with 15.
A. 11
B. 23
C. 21
D. 33
Answer: A
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Solve the problem.A company knows that the unit cost C and the unit revenue R from the production and sale of x units are related by 
Find the rate of change of unit revenue when the unit cost is changing by 
and the unit revenue is $4000.
A. $373.20/unit B. $557.90/unit C. $260.00/unit D. $188.50/unit
Construct a truth table for the statement.(s ? ~q) ? (s ? ~q)
A. 
| T | T | T |
F T F
F F T
B.
| T | T | F |
F T T
F F T
C.
| T | T | T |
F T F
F F F
D.
| T | T | F |
F F F
F T T
Solve and graph.3x2 + 4x - 4 ? 0
A. x ? -2 or x ? 
B. x ? 
C. x ? -2
D. -2 ? x ? 
Find the probability.The distribution of B.A. degrees conferred by a local college is listed below, by major.MajorFrequencyEnglish2073Mathematics2164Chemistry318Physics856Liberal Arts1358Business1676Engineering 8689313What is the probability that a randomly selected degree is not in Mathematics? Give your answer as a decimal rounded to three decimal places.
A. 0.682 B. 0.303 C. 0.232 D. 0.768