Simplify.
A. 
B. -21
C. 11
D. 21
Answer: D
Mathematics
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Graph.9x2 + 64y2 = 576
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A church steeple casts a shadow 111 ft long, and at the same time a 9-ft post casts a shadow 6 ft long. How high is the steeple? Round your answer to the nearest foot, if necessary.
A. 167 ft B. 9 ft C. 74 ft D. 120 ft
Mathematics
Use a graphing utility to find the discontinuities of the given rational function.f(x) = 
A. 4 B. -2 C. 2 D. The function is continuous for all values of x.
Mathematics
Plot the complex number.-3 + i
A. 
B. 
C. 
D. 
Mathematics