Solve the problem. If necessary, round to the nearest tenth or as indicated. An airplane is cruising at an altitude of 21,120 ft. What is the plane's altitude in miles?
A. 4 mi
B. 3 mi
C. 5 mi
D. 8 mi
Answer: A
Mathematics
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Find the area of the triangle.
A. 76.5 km2 B. 63 km2 C. 153 km2 D. 119 km2
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Simplify.
A. 
B. 
C. - 
D. 
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Solve for the missing side, x.
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Perform the indicated operation.(-9x3 - 9x2 + 9x + 7) + (-3x3 + 7x - 3)
A. -12x3 - 2x2 - 3x + 7 B. -12x3 - 9x2 + 16x + 4 C. -12x3 + 16x + 4 D. -3x3 - 2x2 + 6x + 7
Mathematics