Perform the indicated operation.
- 
A. 
B. 
C. 
D. 
Answer: B
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Solve the problem.The sum of the measures of the angles in any triangle is 180 degrees. In triangle ABC, angles A and B have the same measure, while angle C is 12 degrees larger than each of the other two angles. Find the measure of angle C.
A. 112 degrees B. 124 degrees C. 56 degrees D. 68 degrees
Write a system of equations to describe the problem situation. Use guess and check to solve the problem.
An airplane flies westbound from Denver to San Francisco (950 miles) with the wind in 3.8 hours. On a return flight against the same wind, the travel time is 5 hours. Find the speed of the wind, w. A) w = 45 mph B) w = 40 mph C) w = 35 mph D) w = 30 mph E) w = 25 mph
If A denotes the area of the sector of a circle of radius r formed by the central angle ?, find the missing quantity. If necessary, round the answer to two decimal places.? = 
radians, A = 99 square meters, r = ?
A. 155.43 m B. 38.86 m C. 6.23 m D. 15.88 m
Find the intervals on which the function is increasing and the intervals on which the function is decreasing.f(x) = x2 - 6x + 5
A. Increasing on (-?, 3); decreasing on (3, ?) B. Increasing on (3, ?); decreasing on (-?, 3) C. Increasing on (-?, - 3); decreasing on (-3, ?) D. Increasing on (- 3, ?); decreasing on (-?, -3)