Lake Belton High School prevailed in Saturday's track meet with the help of 20 individual-event placers earning a combined toral points. A first-place finish earns 5 points, a second-place finish earns 3 points, and a third-place finish earns 1 point. LBHS had second-place showing, with as many second-place finishers as first- and third-place finishers combined. Write a system of equations that can be used to determine how many \( x \) first, \( y \) second, and \( z \) third place finishers there were. NO Sf

Simplify the expression: \( 3 z-6+7-3 z+9 \)

Which of the following equations represents a line that passes through the points \( (-4,11) \) and \( (6,-9) \) ? \[ \begin{array}{l}\text { I. } y=-2 x+3 \\ \text { II. } y+9=-2(x-9) \\ \text { Answer } \\ \text { Neither } \\ \text { II only }\end{array} \] I only I II

Which of the following equations represents a line that passes through the points \( (8,2) \) and \( (-4,-7) \) ? I. \( y-2=\frac{3}{4}(x-8) \) II. \( 3 x-4 y=16 \) Answer Neither II only

Graph the solution set of the following system of inequalities. \[ \begin{array}{l}x+y \leq 4 \\ y \geq x^{2}-3\end{array} \]

Resolver \( \left\{\begin{aligned} x+2 y+z & =4 \\ 3 x+z & =2 \\ x-y+z & =7\end{aligned}\right. \)