Simplify. Assume that all variables represent positive real numbers.-9r2
+ 7r2
A. -2r2
B. -2r3
C. 2r2
D. Cannot be simplified
Answer: D
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Solve the problem.Graph 1 is connected and every edge is a bridge. Graph 2 is such that for any pair of vertices in the graph there is one and only one path joining them.
A. Graph 1 must be a tree; Graph 2 must be a tree. B. Graph 1 cannot be a tree; Graph 2 cannot be a tree. C. Graph 1 must be a tree; Graph 2 may or may not be a tree. D. Graph 1 must be a tree; Graph 2 cannot be a tree. E. none of these
Graph the inequality.
+ 
> 1
A. 
B. 
C. 
D. 
Find the zeros of the polynomial function and state the multiplicity of each.f(x) = 9x6 + x4
A. 0 (multiplicity 4), ± 
i (multiplicity 1)
B. 0 (multiplicity 4), ± 
(multiplicity 1)
C. 1 (multiplicity 4), - 
i (multiplicity 1)
D. 0 (multiplicity 4), 
i (multiplicity 1)
The function f is one-to-one. Find its inverse.f(x) = (x + 2)3 - 8.
A. f-1(x) = 
B. f-1(x) = 
- 2
C. f-1(x) = 
D. f-1(x) = 
+ 8