Solve the equation.
= 
A. {7}
B. {5}
C. {-7}
D. 
Answer: C
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Answer as requested.Which of the following is likely the result of some common underlying cause rather than a direct cause?
A. The more cash I take out at the ATM, the more my account balance decreases. B. When the NASDAQ rises, the Dow Jones Industrial Average also tends to rise. C. The more items sold, the greater the revenue. D. People who eat a lot of dessert tend to be heavier than those who don't.
Decide whether the given statement is always true or not always true.A ? (B ? C) = (A ? B) ? C
A. Not always true B. Always true
The following double-bar graph illustrates the revenue for a company for the four quarters of the year for two different years. Use the graph to answer the question. 
Which quarter had the same revenue for 2009 and 2010?
A. second quarter B. third quarter C. first quarter D. fourth quarter
Add or subtract as indicated.- 
+ 
A. 
B. 
C. 
D. 