Find the exact value by using a half-angle identity.cos 
A. - 
B. 
C. - 
D. 
Answer: B
Mathematics
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Solve the problem.A plane flies 420 miles with the wind and 340 miles against the wind in the same length of time. If the speed of the wind is 30 mph, what is the speed of the plane in still air?
A. 275 mph B. 285 mph C. 290 mph D. 310 mph
Mathematics
State whether the function is a polynomial function or not. If it is, give its degree. If it is not, tell why not.8(x - 1)11(x + 1)7
A. Yes; degree 8 B. Yes; degree 11 C. Yes; degree 18 D. Yes; degree 88
Mathematics
Find the slope of the line containing the given points. Simplify if possible.(3, -3) and (6, -3)
A. 3
B. 0
C. undefined
D. - 
Mathematics
Find an equation of the line containing the given pair of points(4, -17) and (8, -37)
A. y = - 
x - 
B. y = 
x - 
C. y = -5x + 3
D. y = 5x - 37
Mathematics