The variable in the problem below represents a positive real number. Simplify each term, and combine, if possible. 
Definitions:
Q21: A boat travels 39 miles up the
Q53: Reduce the following rational expression to lowest
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Q70: The following statement is false. Correct the
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Q153: Graph <img src="https://d2lvgg3v3hfg70.cloudfront.net/TBX8806/.jpg" alt="Graph and
Q174: Solve the equation. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TBX8806/.jpg" alt="Solve the
Q206: Solve the equation. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TBX8806/.jpg" alt="Solve the
Q209: Solve the equation. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TBX8806/.jpg" alt="Solve the
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