Simplify, where possible.4x - 9y - 2x + 7y
A. 2x - 9y + 7
B. -2x - 2y
C. 2x - 2y
D. 2x - 16y
Answer: C
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Solve.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 175 seconds are required to make a 
enlargement, find the time required for a 
enlargement.
A. 378 s B. 432 s C. 486 s D. 324 s
Solve the problem.A rock falls from a tower that is 224 ft high. As it is falling, its height is given by the formula 
How many seconds will it take for the rock to hit the ground (h=0)?
A. 3136 s B. 14.4 s C. 15 s D. 3.7 s
Solve.Jan swims at a speed of 4.6 mph in still water. The river she's in flows at a speed of 3.5 mph. How long will it take Jan to swim 2.9 mi downstream? Round your answer to the nearest tenth of an hour, if necessary.
A. 0.4 hr B. 2.6 hr C. 23.5 hr D. 2.8 hr
Multiply.0.59 × 0.5
A. 2.95 B. 0.295 C. 0.00295 D. 0.0295