Provide an appropriate response.In your own words, describe the procedure for adding any two rational expressions.
What will be an ideal response?
If the denominators are the same, add the numerators and write the sum over the denominator. Simplify, if possible. If the denominators are different, first rewrite the expressions with a common denominator, then proceed as above.
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The table shows the numbers 
(in thousands) of residents from 2002 through 2007.
YearNumber of residents, 
2002 640 2003 655 2004 670 2005 670 2006 683 2007 699?
Find the first differences of the data shown in the table.
A. 
B. 
C. 
D. 
E. 
Factor completely.
A. 
B. 
C. 
D. 
E. 
Refer to the pictograph.
How much more money did parents spend than children?
A. $150 B. $105 C. $125 D. $120 E. $145
Subtract.- 
A. 14.000 B. 12.698 C. 12.682 D. 12.692