Solve the problem. Round to the nearest tenth if necessary.By switching service providers, a family's telephone bill decreased from about $50 a month to about $45. What was the percent of decrease?
A. 11.1%
B. 10%
C. 11%
D.
| 5% |
Answer: B
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Solve the problem.The Mathematics Department is holding an election for department chair. Each member ranks the candidates from first to third. The preference schedule below shows the results of the preliminary nonbinding ballots with candidates Clark (C), Jones (J), and Smith (S).
A second election is then held, which yields the following preference schedule:
If the method of pairwise comparisons is used to determine the winner, is Fairness Criterion 3 satisfied?
A. no B. yes
Identify the figure and name it using the labels shown.
A. ?z
B. point z
C. line z, or 
D. ray z, or 
Factor by grouping.12x2 - 16xy - 15xy + 20y2
A. (4x + 5y)(3x - 4y) B. (12x - 5y)(x - 4y) C. (4x - 5)(3x - 4) D. (4x - 5y)(3x - 4y)
Solve the system by the addition method.
A. {(2
, 
), (-2
, 
), (2
, -
), (-2
, -
)}
B. {(2
, 
), (-2
, -
)}
C. {(0, 0)}
D. {(2
, 
), (-2
, 
)}