Simplify the Rational Expression

question 71

Multiple Choice

Simplify the rational expression. Use factoring, and assume all variable expressions represent positive real numbers.
-If the lengths of the sides of a square are tripled, by what factor will the area change?

• A) 9
• B) 6
• C) 27
• D) 3

---

Definitions:

z

A statistical measure that represents the number of standard deviations an element is from the mean of its population.

Standard Normal Random Variable

A variable that follows a normal distribution with a mean of 0 and a standard deviation of 1.

Area

In mathematics, Area refers to the measure of the extent of a two-dimensional surface or shape, expressed in square units.

z

A standard score indicating how many standard deviations an element is from the mean in a normal distribution.