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Prerequisite Assignment: MyMathLab® Study Plan for Week 3 Checkpoint

1. Click the CheckPoint tab.
2. Click External Content Launch to access MyMathLab®.
3. After earning at least 60% of the Mastery Points in the MyMathLab® Study Plan for Week 3 Checkpoint, complete the Week 3 Checkpoint in MyMathLab®.

Important Note: It is highly recommended that you earn all of the possible Mastery Points in the MyMathLab® Study Plan for Week 3 Checkpoint. This Weekly Checkpoint contains 15 questions. You have one attempt to complete the Weekly Checkpoints and do not have access to the Help Me Solve This or View an Example features.

MTH 220 Week 3 Checkpoint

Solve the system of equations by the substitution method.

Solve the system by the addition method.

Solve the system by the method of your choice.

Four times a first number decreased by a second number is negative 38. The first number increased by twicethe second number is 4.Find the numbers.

Solve the system by the substitution method.

Graph the following inequality.

Graph the following inequality.

Graph the solution set of the system of inequalities.

Write the augmented matrix for the system of equations to the right.

Write the system of linear equations represented by the augmented matrix to the right. Use x, y, and z for the variables.

Perform the row operation on the given augmented matrix.

Solve the system using matrices. Use Gaussian elimination with back-substitution or Gauss-Jordan elimination.

a.  Give the order of the given matrix.

b.  If A equals left bracket a Subscript ij Baseline right bracket ,identify a 32and a 23 if possible.

Find the following matrices where A= b=

Find the following matrices where