Provide an appropriate response.What are two possible LCDs which could be used for the sum 
+ 
?
What will be an ideal response?
Answers will vary. One possible solution: x - 6, 6 - x.
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Write the decimal as a fraction in lowest terms.4.80
A. 
B. 
C. 
D. 
Add or subtract. Simplify your answer to lowest terms.
+ 
A. 
B. 
C. 
D. 
Provide the proper response.To rationalize the denominator of an expression such as 
, we multiply both the numerator and the denominator by 
. By what number are we actually multiplying the given expression, and what property of real numbers justifies the fact that our result is equal to the given expression?
What will be an ideal response?
Solve the problem.An exam consists of 9 multiple-choice questions and 6 essay questions. If the student must answer 6 of the multiple-choice questions and 2 of the essay questions, in how many ways can the questions be chosen?
A. 261,273,600 B. 1,814,400 C. 1260 D. 648