Solve the inequality.x2 - 9x ? 0
A. [0, 9]
B. [-9, 0]
C. (-?, 0] or [9, ?)
D. (-?, -9] or [0, ?)
Answer: C
Mathematics
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Solve the equation for the specified variable.d = rt for r
A. r = d - t
B. r = 
C. r = 
D. r = dt
Mathematics
Shade the solution set in the xy-plane.x + y ? 6
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A boat is towed toward a dock by a cable attached to a winch that stands 15 ft above the water level (see figure). Let ? be the angle of elevation of the winch and let z be the length of the cable as the boat is towed toward the dock. Compute 
when 
A. 
= -0.00030
B. 
= -0.00418
C. 
= -0.26287
D. 
= -0.00446
Mathematics
Factor the sum or difference of two cubes.1000y3 - 1
A. (1000y - 1)(y2 + 10y + 1) B. (10y + 1)(100y2 - 10y + 1) C. (10y - 1)(100y2 + 10y + 1) D. (10y - 1)(100y2 + 1)
Mathematics