Evaluate the sum.
A. 75
B. 36?
C. 25?
D. 75?
Answer: D
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Solve the problem.The amount of time it takes a swimmer to swim a race is inversely proportional to the average speed of the swimmer. A swimmer finishes a race in 37.5 seconds with an average speed of 4 feet per second. Find the average speed of the swimmer if it takes him 50 seconds to finish the race.
A. 5 ft/sec B. 2 ft/sec C. 3 ft/sec D. 4 ft/sec
Solve the problem.A cross-section of an irrigation canal is a parabola. If the surface of the water is 38 feet wide and the canal is 19 feet deep at the center, how deep is it 1 feet from the edge?
A. 17.1 ft B. 1 ft C. 18 ft D. 1.9 ft
Multiply mentally.(-9 + 5x)(9 + 5x)
A. 25x2 + 90x - 81 B. 25x2 - 90x - 81 C. x2 - 81 D. 25x2 - 81
Sketch the graph of the line by locating the second point with the rise-and-run method.Through (4, -6), m = - 8 
A. 
B. 
C. 
D. 