Solve the system by either elimination or substitution. Verify your work by using "intersect" on your graphing calculator of by checking that your result satisfies both equations of the system.5(2x + 3) - y = -307x - 5(y - 3) = -38
A. (4, 5)
B. (-4, 5)
C. (-5, 4)
D. (5, -4)
Answer: B
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Solve the application.The resevoir at the top of a water tower has the shape of a sphere with a radius of 10.1 meters. How many cubic meters of water can the reservoir hold? Use 3.14 for ? to approximate the answer to two decimal places if necessary.
A. 320.31 ft3 B. 427.08 ft3 C. 4313.53 ft3 D. 3235.15 ft3
An empty swimming pool can be filled in 11 hours. When full, the pool can be drained in 25 hours. How long will it take to fill the empty pool if the drain is left open? ?
A. 27 hours B. 21 hours C. 20 hours D. 22 hours E. 19 hours
Solve the problem.A thermometer reading 11°C is brought into a room with a constant temperature of 30°C. If the thermometer reads 18°C after 3 minutes, what will it read after being in the room for 8 minutes? Assume the cooling follows Newton's Law of Cooling: U = T + (Uo - T)ekt.(Round your answer to two decimal places.)
A. 24.42°C B. 29.52°C C. 1.07°C D. 35.58°C
Solve the problem.A rectangular Persian carpet has a perimeter of 164 inches. The length of the carpet is 18 in. more than the width. What are the dimensions of the carpet?
A. Width: 73 in.; length: 91 in. B. Width: 64 in.; length: 82 in. C. Width: 32 in.; length: 50 in. D. Width: 50 in.; length: 68 in.