Tell whether or not the rational expressions are equivalent.
, 
A. No
B. Yes
Answer: B
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Compare the right-hand and left-hand derivatives to determine whether or not the function is differentiable at the point whose coordinates are given.
? y = x2 y = 
A. Since limx?1+ f '(x) = 
while limx?1- f '(x) = 2, f(x) is not differentiable at 
B. Since limx?1+ f '(x) = 
while limx?1- f '(x) = 1, f(x) is not differentiable at 
C. Since limx?1+ f '(x) = 2 while limx?1- f '(x) = 
, f(x) is not differentiable at 
D. Since limx?1+ f '(x) = 2 while limx?1- f '(x) = 2, f(x) is differentiable at 
Express the number as the ratio of two integers.0.909090 . . .
A. 
B. 9
C. 
D. 
Find the mean of the list of data.75, 86, 60, 82, 57, 86, 58
A. 86 B. 63 C. 72 D. 75
Simplify by removing grouping symbols and combining like terms.2[6(2x - y ) - 6(x + 6y)]
A. 12x + 60y B. 18x - 48y C. 12x + 10y D. 12x - 84y