Find the least common denominator of the rational expressions.
and 
A. x(x + 7)
B. x + 7
C. 40
D. x
Answer: A
Mathematics
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Rationalize the denominator of the following expression and then simplify your answer.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Find the square root if it is a real number. If it is not a real number, state so.
A. 14 B. -14 C. not a real number D. 98
Mathematics
Perform the indicated operation.(5a2 - 12b)(-4a2 + 8b + c)
A. -20a4 + 88a2b - 96b4 + 5a2bc B. -20a4 + 88a2b2 - 96b2 C. -20a4 + 88a2b + 5a2c - 96b2 - 12bc D. -20a2 + 88ab + 5a2c - 96b2 - 12c
Mathematics
Solve the equation.12x - 14 = 0
A. 
B. 
C. 
D. 
Mathematics