91Ó°ÊÓ

Compare the quantity in Column A and the quantity in Column B. Then determine whether:

(A) The quantity in Column A is greater,

(B) The quantity in Column B is greater,

(C) The two quantities are equal, or

(D) The relationship cannot be determined from the information given.

19.

Column A: The percent increase from 75 to 100.

Column B: The percent decrease from 100 to 75.

Solve each system of inequalities by graphing.2

$\begin{array}{c}yâ‰\yen 3x-4\\ y≤x+3\end{array}$

2. Give an example of a system of inequalities that from a bounded region.

Tell whether the following statement is true or false If false, give a counterexample. A system of two linear inequalities has either no points or infinitely many points in its solution.

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

$\begin{array}{l}yâ‰\yen -2x\\ y≤-3\end{array}$

2: The process of adding or subtracting to remove a variable and simplify solving the system of equations is called (substitution, elimination).

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

A system of equations that has an infinite number of solutions.

2.FIND THE ERROR Melissa is solving the system of equations

$r+2s+t=3,2r+4s+2t-6,$and$3r+6s+3t=12.$Is she correct? Explain your reasoning.

Give an example of a system of equations that is consistent and independent.

Make a conjecture about the solution of a system of equations if the result of subtracting one equation from the other is $0=0$.