Solve.15x + 3x2 = 0
A. -7.5
B. -3, -5
C. 0, -5
D. -5
Answer: C
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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
Solve the problem.Find the 13th pentagonal number that corresponds to the following dot sequence.
A. 169 B. 247 C. 91 D. 260
List the intercepts of the graph. 
A. (-9, 0), (0, 9) B. (-9, 0), (0, -9), (0, 9), (9, 0) C. (-9, 0), (0, -9), (0, 0), (0, 9), (9, 0) D. (0, 9), (9, 0)
Graph the system of inequalities, and find the coordinates of the vertices.3x + 2y ? -6 x - 1 ? 0
A. 
B. 
C. 
D. 