## Elementary Algebra

Let x represent her score in the third game. Her average will be $\frac{132\ +\ 160\ +\ x}{3}$. This average should be at least 150. So, we solve the following inequality. $\frac{132\ +\ 160\ +\ x}{3}$ $\geq$ 150. Multiply both sides by 3. 132 + 160 + x $\geq$ 450 x $\geq$ 450 - 160 - 132 x $\geq$ 158 So, she must bowl at least 158 to have an average of at least 150 for the three games.