Solve the system.
A. x = 8, y = 8, z = 0
B. x = -8, y = 0, z = 0
C. x = 0, y = -8, z = -8
D. x = 0, y = 8, z = 0
Answer: D
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Solve the problem.In a round robin tennis tournament, every player plays against every other player. If 24 players are entered in a round robin tennis tournament, how many matches will be played?
A. 
B. 224
C. 242
D. 24 × 23
E. 24 × 2
Provide an appropriate response. When an airplane leaves the runway, its angle of climb is 22° and its speed is 235 feet per second. Find the plane's altitude after 1 minute.
A. 5,282 ft B. 627.3 ft C. 88.0 ft D. 5,696.8 ft
Answer the question.If we apply the quadratic formula and find that the value of b2 - 4ac equals zero, what can we conclude about the solutions?
A. The equation has no real number solutions. B. The equation has two different rational solutions. C. The equation has exactly one rational solution. D. The equation has exactly one irrational solution.
Solve the problem.Paul Nagel invested some money at 4.5% simple interest and $7000 more than that amount at 2.5% simple interest. After 1 year, his total interest from the two accounts was $455. How much did he invest at each rate?
A. $5000 at 4.5%; $11,000 at 2.5% B. $5000 at 4.5%; $10,000 at 2.5% C. $4000 at 4.5%; $11,000 at 2.5% D. $4000 at 4.5%; $12,000 at 2.5%