Solve the system.x + 3y + 3z = -20 3y + 4z = -29 z = -5
A. ?
B. {(4, -5, -3)}
C. {(-5, -3, 4)}
D. {(4, -3, -5)}
Answer: D
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Solve the problem. Round results to an appropriate number of significant digits.A plane is found by radar to be flying 5.7 km above the ground. The angle of elevation from the radar to the plane is 84.0°. Ten seconds later, the plane is directly over the station. Find the speed of the plane, assuming that it is flying level.
A. 230 km/hr B. 240 km/hr C. 210 km/hr D. 220 km/hr
Solve the problem. Round your answer to the nearest tenth of a percent, if necessary.3.8 is what percent of 21?
A. 0.2% B. 5.5% C. 552.6% D. 18.1%
Solve the problem.In 1992, the population of a country was estimated at 5 million. For any subsequent year, the population, P(t) (in millions), can be modeled using the equation 
where t is the number of years since 1992. Determine the year when the population will be 39 million.
What will be an ideal response?
Graph the hyperbola.
- 
= 1
A. 
B. 
C. 
D. 