Solve.Find the hypotenuse of a right triangle if the lengths of its legs are 4 and 
.
A. 2
B. 
C. 3
D. 14
Answer: C
Mathematics
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Solve.An express train travels 267 miles between two cities. During the first 
of a trip, the train traveled through mountainous terrain. The train traveled 
per hour slower through mountainous terrain than through level terrain. If the total time to travel between the cities was 7 hours, find the speed of the train on level terrain.
A. 51 mph B. 41 mph C. 31 mph D. 21 mph
Mathematics
Solve the problem.Find the image of the given figure under a reflection across the mirror line m.
A. 
B. 
C. 
D. 
Mathematics
Add.(4x2 - 2xy + y2) + (4x2 - 5xy - y2) + (x2 + xy - y2)
A. 8x2 - 7xy - y2 B. 9x2 - 6xy + y2 C. 9x2 - 6xy - y2 D. 7x2 - 8xy - y2
Mathematics
Differentiate implicitly to find d2y/dx2.y2 + xy + x2 = 8
A. - 
B. - 
C. 
D. 
Mathematics