Sample Response: If both expressions have the same value after substituting and simplifying for x = 6 and x = 10, then they are equivalent. Substitute 6 for each variable, x, in both expressions. Use the order of operations to simplify both expressions. The value of both expressions is 88. Now, substitute 10 for each variable, x, in both expressions. Use the order of operations to simplify both expressions. The value of both expressions is 120. Therefore, the expressions are equivalent.
If 63% lie above the z-score, then 37% lie below, or to the left.
On the "negative" chart locate the value closest to 0.37. It is 0.3070 that corresponds to the z-score of -0.33.
