Perform the indicated operation. Assume that all variables are nonnegative.
+ 
- 
A. 2x
B. 6x
C. 10x
D. -2x
Answer: A
Mathematics
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Find the cardinal number for the set.B = {x|x ? N and 1 ? x < 9}
A. 8 B. 10 C. 7 D. 9
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Graph the function. Specify the intervals over which the function is increasing and the intervals where it is decreasing.y = 
A. Decreasing -? < x < 0 and 0 < x < ?
B. Increasing -? < x < ?
C. Decreasing -? < x < 0;
Increasing 0 < x < ?
D. Increasing -? < x < 0 and 0 < x < ?
Mathematics
Find the equivalent earnings.Arnold earns $239 a week. What is his yearly salary?
A. $11,950 B. $2390 C. $12,428 D. $1035.67
Mathematics
Perform the necessary operations.-5 + 2 - (-16) + 1
A. -18 B. 14 C. -22 D. 12
Mathematics