Simplify the expression. Assume all variables represent positive real numbers.11
+ 9
A. 20
B. 20
C. 20
D. -2
Answer: C
Mathematics
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Solve the problem.Audrey Graco plans to conduct book signings in several cities to promote her new novel. She wishes to visit Knoxville, Chattanooga, Chapel Hill, Charlotte, Raleigh, and Richmond. How many different ways can she visit each of these cities and return to her starting point in Wilmington?
A. 30 B. 720 C. 120 D. 29
Mathematics
Decide whether or not the given equation is an identity.
= sec ?
A. Yes B. No
Mathematics
Provide an appropriate response.Find the mistake and correct the problem:What percent of 30 is 150?R = 
× 100%R = 
× 100%R = 20%
What will be an ideal response?
Mathematics
Find the absolute value.|-21|
A. 21 B. 0 C. -21 D. ±21
Mathematics