Solve the problem.A man rode a bicycle for 12 miles and then hiked an additional 8 miles. The total time for the trip was 5 hours. If his rate when he was riding a bicycle was 10 miles per hour faster than his rate walking, what was each rate?
A. Bike: 12 mph
Hike: 2 mph
B. Bike: 11.5 mph
Hike: 1.5 mph
C. Bike: 13 mph
Hike: 3 mph
D. Bike: 14.5 mph
Hike: 4.5 mph
Answer: A
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Factor, if possible.-72 + 17x - x2
A. -(x - 9)(x - 8) B. -(x + 9)(x + 8) C. (x - 9)(x - 8) D. -(x - 9)(x + 8)
Provide an appropriate response.Change 70 kilometers to miles. (Round to nearest tenth; 1 mi = 1.6 km.)
A. 112.5 B. 112 C. 43 D. 43.8 E. none of the above
Explain how to obtain the graph of the second function from the graph of the first function, or state that the graphs are identical.y = cos x, y = cos 
A. The graphs are identical.
B. Reflect the graph over the y-axis, and then translate it 
to the left.
C. Reflect the graph over the y-axis, and then translate it 
to the right.
D. Reflect the graph over the x-axis, and then translate it 
to the left.
Solve the problem.The temperature at the South Pole was 35° at 8 A.M. At 3 P.M., it was -12°. By how many degrees did the temperature drop?
A. -23° B. 47° C. -47° D. 23°