GRE
$$\frac{x^{3}}{9}$$
$$(\frac{x}{9})^{3}$$
The average (arithmetic mean) of the numbers x, -x, and |x|
x
The sum of the measures of two of the interior angles of triangle ABC
The sum of the measures of two of the interior angles of triangle PQR
m+5
8-n
$$\frac{1}{2}(x+y)$$
$$\frac{1}{2}x + y$$
The percent increase in the dollar value of the antique from 1980 to 1984
56%
The number of possible values of x
6
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