Simplify.3a - 5b + 8 + 9b + 8a + 2
A. 25ab
B. 11a + 12b - 3
C. 11a2 + 4b2 + 10
D. 11a + 4b + 10
Answer: D
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Use the guidelines to evaluate the study. From the information given, what is the biggest flaw in the study?A high school principal wanted to know how the teachers at her school felt about early dismissal for Homecoming. She put the names of the 114 faculty in a hat and randomly selected 30 of the names. She gave questionnaires to those 30 people asking whether they agreed or disagreed with the following statement: "Valuable learning time should not be sacrificed for extracurricular social activities." The questionnaires were filled out anonymously. Her conclusion was that 80% of the faculty were opposed to early dismissal for Homecoming.
A. The setting may discourage honest responses B. Participation bias C. Selection bias D. Confounding variables E. The wording of the question
Find the slope of the polar curve at the indicated point.r = 9(1 + cos?), ? = 
A. 1 - 
B. 4
C. 
D. -2
Solve and check. Identify any extraneous solutions.
- 
= 1
A. 4 (-3 is extraneous) B. No solution (3 is extraneous) C. 4 (3 is extraneous) D. 4, 3
Solve the problem.Photographic reprints cost $0.52 each at a local photo shop, or $0.44 each, plus $1.15 postage and handling, through the mail. How many reprints must a customer purchase to make it less expensive to use mail order?
A. more than 20 reprints B. more than 13 reprints C. more than 14 reprints D. more than 19 reprints