Simplify. Assume that any variables are positive.
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.On a biology test, a student got 25 questions correct but did not pass. On a second attempt, the student got 30 questions correct. What was the percent of increase?
A. 80% B. 20% C. 16.7% D. 5%
A garbage truck must pick up garbage at 4 different dump sites (A, B, C, and D) as shown in the graph below, starting and ending at A. The numbers on the edges represent distances (in miles) between locations. The truck driver wants to minimize the total length of the trip.
The cheapest-link tour starting with vertex A is given by:
A. A, D, C, B, A. B. A, B, C, D, A. C. A, B, D, C, A. D. A, C, B, D, A. E. none of these
Provide an appropriate response.If a, b, and c are real numbers, is this statement true or false? 
A. True B. False
Simplify.
A. 
B. -1
C. 
D. 