1. Matrices and Formulas V = lwh

2. Part I: Matrices A matrix looks like a table; it has numbers listed in rows and in columns.

3. What are the DIMENSIONS of this matrix? row column Answer: 3 x 2

4. Add these two matrices:

5. Answer:

6. The matrix below shows how many shirts were sold in a store: Mon Tues Wed Small Medium Large How many small shirts were sold? Answer: 132 How many shirts were sold on Tuesday? Answer: 465

7. The matrix below shows food sold at a carnival: Day 1 Day 2 Candy Apples Cotton Candy Soda Chips How much more cotton candy was sold on the first day than on the second day? Answer: 101

8. The matrix below shows the supplies needed for building two different models of trucks: Wheels Plastic Sheets Paint Cans Glue bottles Dump Truck Fire Truck 4 10 1 2 8 22 2 3 How many sheets of plastic are needed to build 17 fire trucks? Answer: 374

9. Parts II: Formulas A formula tells what information is needed and what math operations to use to determine an answer. d = rt d = distance r = rate t = time h = -16t 2 + 40t + 8 h = height t = time

10. The formula below is used to determine the area of a triangle. What is the area of this triangle? 4 cm 3 cm ANSWER: A =(.5)(3)(4) = 6 cm 2 (b is the length of the base and h is the height of the triangle)

11. The formula below can be used to find actual air temperature: (t = temperature and w = wind-chill temperature) What is the actual air temperature if the wind-chill temperature if -12 ? Answer: 18

12. The formula below is used to determine the cost of a car rental: (C = total cost and m = number of miles driven) If the cost is $ 52, how many miles were driven? Answer: 112 miles

13. MATRICES AND FORMULAS The End