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# 108 Matrices

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Lesson on how to construct an use matrices.

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• 10/25/09 alg02_15 Bitsy Griffin
• 10/25/09 alg02_15 Bitsy Griffin
• 10/25/09 alg02_15 Bitsy Griffin
• 10/25/09 alg02_15 Bitsy Griffin
• 10/25/09 alg02_15 Bitsy Griffin
• 10/25/09 alg02_15 Bitsy Griffin
• 10/25/09 alg02_15 Bitsy Griffin
• 10/25/09 alg02_15 Bitsy Griffin
• ### 108 Matrices

1. 1. The Matrix Matrices 10/25/09 Algebra 1.1 Bitsy Griffin
2. 2. Essential Question: <ul><li>What is a matrix? </li></ul><ul><li>How do I construct and use one? </li></ul>10/25/09 Algebra 1.1 Bitsy Griffin
3. 3. Spreadsheet 10/25/09 Algebra 1.1 Bitsy Griffin <ul><li>Cell </li></ul><ul><ul><li>Each boxed area is called a cell. </li></ul></ul>Percent of Teenage Computer Users Games Music Edu Graphics Excel email Boys 80 43 43 47 90 29 Girls 74 32 51 54 36 32
4. 4. Matrix <ul><li>Delete labels & outlines. </li></ul><ul><li>A matrix is left! </li></ul>10/25/09 Algebra 1.1 Bitsy Griffin C= 80 43 43 47 90 29 74 32 51 54 36 32
5. 5. Matrix <ul><li>Size: </li></ul><ul><ul><li>Dimensions </li></ul></ul><ul><ul><li>Rows by columns </li></ul></ul><ul><ul><li>Matrix C is a 2 x 6 </li></ul></ul><ul><li>Entry </li></ul><ul><ul><li>Each value in a matrix is called an entry. </li></ul></ul>10/25/09 Algebra 1.1 Bitsy Griffin
6. 6. Add & subtract matrices <ul><li>Add or subtract the numbers that are in the identical location in both matrices. </li></ul><ul><li>Matrices must have the same dimensions to Add or Subtract. </li></ul>10/25/09 Algebra 1.1 Bitsy Griffin
7. 7. Add & subtract 10/25/09 Algebra 1.1 Bitsy Griffin 11 16 -1.5 2
8. 8. Multiply matrices <ul><li>Distribute the number in front to all terms in matrix </li></ul>10/25/09 Algebra 1.1 Bitsy Griffin
9. 9. Multiply 10/25/09 Algebra 1.1 Bitsy Griffin 6 24 -12 1.5
10. 10. Essential Question: <ul><li>What is a matrix? </li></ul><ul><li>How do I construct and use one? </li></ul>10/25/09 Algebra 1.1 Bitsy Griffin