Find the length of the unknown side of the right triangle. In each case, a and b represent the lengths of the legs and c represents the length of the hypotenuse.
a = 25, b = 60; find c
A. 2975
B. 4225
C. 5
D. 65
Answer: D
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Simplify the expression.(-21) ÷ (-3)
A. -8 B. 7 C. -7 D. 8
Find the indicated composition.f(x) = 
; g(x) = 
Find (f ? g)(x).
A. (f ? g)(x) = 
B. (f ? g)(x) = 
C. (f ? g)(x) = 
D. (f ? g)(x) = 
Two planes take off at the same time from an airport. The first plane is flying at 246 miles per hour on a course of 130.0°. The second plane is flying in the direction 165.0° at 359 miles per hour. Assuming there are no wind currents blowing, how far apart are they after 2 hours? ? Apply the rules regarding the use of significant digits after all computations are complete. ?
A. 423 miles B. 421 miles C. 427 miles D. 431 miles E. 429 miles
Find the center and radius of the circle 
.
A. center: (0, 0), radius: 11 B. center: (-1, 1), radius: 11 C. center: (0, 0), radius: 7 D. center: (-1, -1), radius: 7 E. center: (-7, -11), radius: 7