2. Objective Video Example by Mrs. G Give It a Try Lesson 4.1  Add and subtract matrices  Multiply a matrix by a scalar number  Solve a matrix equation

3. Video Objective Video Example by Mrs. G Give It a Try www.youtube.com enerskra67

4. Example by Mrs. G Objective Video Example by Mrs. G Give It a Try Click to continue. Perform the indicated operation, if possible. a)b)

5. Example by Mrs. G Objective Video Example by Mrs. G Give It a Try Click to continue. Perform the indicated operation, if possible. a)b) Check the dimensions. Dimensions of a matrix are written as rows x columns. (R x C) Dimensions must match in order to add or subtract matrices. Step 1: 3 x 11 x 3 Dimensions are different. Therefore, matrices cannot be added. 2 x 3 Dimensions are the same. Therefore, matrices can be subtracted.

6. b) Subtract corresponding entries: Example by Mrs. G Objective Video Example by Mrs. G Give It a Try Click to continue. If dimensions match, add or subtract corresponding entries. Step 2:

7. b) The answer is the 2 x 3 matrix: Example by Mrs. G Objective Video Example by Mrs. G Give It a Try

8. Objective Video Example by Mrs. G Give It a Try Perform the indicated operation, if possible. 1.2. Bring your work and answer to our next class!