4.1 Review Worksheet
4.1.1 Matrices and Data 1. Use the data to answer the questions. a. Display the data as a matrix, P .
Travel Options
Airfare Hotel
Car Rental
Deluxe Business Economy
425.50 398.00 65.99 385.98 245.50 45.90 275.12 103.25 29.50
b. What are the dimensions of P ?
c. What is the entry at p 32 ? What does it represent?
d. What is the address of the entry 385.98?
Use the following matrices for Exercises 2-5. Add or subtract, if possible.
= −
5.1 2.5 2 0 0 1.5
− −
− 3.2 1 1.5 2.4
4.2 1 2.2 0
D
E
F
=
=
−
2. F − E
3. D + E
4. D + F
5. E + F
6. The following table shows estimated college costs in 2004.
Estimated College Costs (per Year) in 2004 Private School In-State Public School Out-of-State Public School 19,188 Costs are expected to increase 5% per year. Use a scalar product to find the estimated costs for each type of college in 2005. Cost ($) 27,677 12,841
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