Simplify the expression.- 
x + 
- 
x
A. 
x + 
B. - 
x + 
C. - 
x
D. - 
x - 
Answer: B
Mathematics
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Plot the set of numbers on a number line.
A. 
B. 
C. 
D. 
Mathematics
If n is an integer, n ? 180° represents an integer multiple of 180°, and 
represents an odd integer multiple of 90°. Decide whether the expression is equal to 0, 1, -1, or is undefined. tan(n ? 180°)
A. 1 B. -1 C. 0 D. Undefined
Mathematics
Write the fraction or mixed number as a percent.
A. 178% B. 17,800% C. 1780% D. 17.8%
Mathematics
Find the indicated sum.
A. 110 B. 35 C. 75 D. 55
Mathematics