Perform the operations indicated. Write your answer in simplest form.- 
- 
A. 
B. - 
C. - 
D. - 
Answer: B
Mathematics
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Solve the problem. Round your answer, if appropriate.One airplane is approaching an airport from the north at 157 km/hr. A second airplane approaches from the east at 299 km/hr. Find the rate at which the distance between the planes changes when the southbound plane is 27 km away from the airport and the westbound plane is 23 km from the airport.
A. -313 km/hr B. -626 km/hr C. -469 km/hr D. -156 km/hr
Mathematics
Simplify. Leave your answer in exponent form.(2xy)6
A. 64xy B. 12x6y6 C. 64x6y6 D. 12xy
Mathematics
Solve.8 = 8 + m
A. 4 B. 0 C. 16 D. 1
Mathematics
Use a calculator to graph the function.y = x + cos x
A. 
B. 
C. 
D. 
Mathematics