Solve the system of equations by substitution, if a solution exists.
A. x = 0, y = -2
B. x = 1, y = -3
C. x = -3, y = 1
D. No solution
Answer: D
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Solve the problem. Round your answer to the nearest tenth unless otherwise indicated.Thompson's Hardware spent $40,570 this year on business insurance alone. If total sales were $707,800, what percent of total sales was spent on business insurance? Round to the nearest tenth of a percent.
A. 5.7% B. 17.4% C. 174.0% D. 0.6%
In order to answer the given question, which of the following types of study would be the most appropriate: an experiment without blinding, an experiment with single blinding, an experiment with double blinding, an observational study, or a case-control study?How do lawyers' salaries compare to doctors' salaries?
A. Experiment with single blinding B. Case-control study C. Observational study D. Experiment without blinding E. Experiment with double blinding
Find all real roots of the given equation by using Newton's method.2x4 - 3x2 - 7x + 1 = 0
A. 1.8111020, 0.1351270 B. 1.8111042, 0.1351248 C. 1.8111020 D. 1.8111042
Find the slope of the line that passes through the given points.(-5, -12) and (3, 1)
A. 
B. - 
C. 
D. 