Use a graphing calculator and the method of matrix inverses to solve the system. Give 5 decimal places.x - 
y =3.72.85x + y = -8.23
A. {(2.61630, -2.88772)}
B. {(-1.57817, -3.73223)}
C. {(3.43297, 0.18882)}
D. {(0, 0)}
Answer: B
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Determine if the ordered pair is a solution to the given inequality.x + 2y > 6; (3, 2)
A. Yes B. No
x? = x(0.1? 0.004x ? 0.001y) , y? = y (0.05 ? 0.001x ? 0.001y) , x (0) = 2, y (0) =1
For the systems of differential equations, use Euler’s method with ?x = 2 to plot the trajectory of x and y to plot the trajectory for 0 ? t ? 500.
Solve the problem.Many people suffering from constricted bronchial muscles inhale the drug Albuterol for relief. The number of micrograms A of Albuterol in a person's bloodstream t minutes after 200 micrograms have been inhaled can be approximated by A = -50t2 + 200t.How long after an inhalation will there be about 192 micrograms of Albuterol in the bloodstream? Round to the nearest tenth of a minute.
A. 1.7 min, 2.3 min B. 1.8 min, 2.2 min C. 1.6 min, 2.4 min D. 1.9 min, 2.1 min
The graph below shows the percentage of students enrolled in the College of Engineering at State University. Use the graph to answer the question. 
Between what two years is the difference in function values equal to 5%?
A. between 1980 and 1985 B. between 1970 and 1975 C. between 1990 and 1995 D. between 1995 and 2000