Algebra 2 Companion Book, Volume 1

4.1.1 Matrices and Data − Worksheet (continued)

Example 3: 6.  The table shows prices for three types of clothing. Use a scalar product to find the price with 8.25% sales tax on each item.

Cost of Athletic Clothing ($) Plain Team Logo

Individualized

T-shirt Shorts

9.00 13.00 6.00 9.50

14.00 11.00 23.00

Jogging Pants 15.00 21.00

Example 4: Use the following matrices for Exercises 7-10. Evaluate, if possible.

−

    

1 1 6 4 0 1 1 2 1

  

  

− 0 4 1 0 2 1      

1 3 3 1 2 0

   

A

B

C

=

=

=

8. C 1 2

7. 3 B

9. A − 2 B

10. 2 C − A

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