Use Cramer's rule to solve the system. If D = 0, use another method to complete the solution. 3x - 2y + 2z - w = 2 4x + y + z + 6w = 8-3x + 2y - 2z + w = 5 5x + 3z - 2w = 1
A. 
B. 
C. ?
D. 
Answer: C
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In the bar graphs below, a projection of population by age groups and gender for two different countries is given as a percent of the country's population at the time. Provide an appropriate response.Population Pyramids for Countries A and B: 2006 and 2050
Which country has a much higher future projection for the 80+ age group? Explain this trend.
A. Country B possibly due to famine. B. Country A possibly due to famine. C. Country A possibly due to increased life expectancy. D. Country B possibly due to increased life expectancy.
Use a proportion to solve the problem.In a sample of 77 widgets, 6 were defective. How many defective widgets would you expect in a sample of 616 widgets?
A. 48 B. 102 C. 51 D. 46
Find the vertex of the parabola.f(x) = 4x - x2
A. 
B. 
C. 
D. 
Solving the following equation will require you to use the quadratic formula. Solve the equation for ? between 0° and 360°, and round your answers to the nearest tenth of a degree.
?
?
A. 201.5°, 338.5° B. 202.1°, 337.9° C. 201.9°, 338.1° D. 200.7°, 339.3° E. 201.7°, 338.3°