Chapter 3: Systems of Equations and Inequalities

$0.05n+0.10(n+8)=2.15$

Solve each equation. Check your solution.

$69.\left|k+7\right|=3k-11$

Determine whether the given point satisfies each inequality.

$69.7x+4y\ge -15; \left(-4,2\right)$

Solve each system of equation by graphing, substitution, or elimination.

$\begin{array}{c}-6x+3y=33\\ -4x+y=16\end{array}$

Choose the letter of the term that best matches each phase.

7. The solution of a system of equations in three variables $\left(x,y,z\right)$

Solve each system of inequalities. Sketch each graph on a sheet of paper.

$\begin{array}{l}6y+4x\ge 12\\ 5y-3x\le -10\end{array}$

Solve each system of equations.

$\begin{array}{l}2r+3s-4t=20\\ 4r-s+5t=13\\ 3r+2s+4t=15\end{array}$

Solve each system of equations by using elimination

$\begin{array}{c}7.2p+4q=18\\ 3p-6q=3\end{array}$

Solve each system of equations.

7.

$\begin{array}{l}2r+3s-4t=20\\ 4r-s+5t=13\\ 3r+2s+4t=15\end{array}$

Find the value of $\left|-4\right|.\left|3\right|.$

(A) -12

(B) -1

(C) 7

(D) 12