Addition and Subtraction of Matrices

What is the value of element M_3,4?
(Think about what is in the 3rd row and 4th column)

• 34
• 42
• 37
• π

Can the operation be performed?

• Yes
• No
• Sometimes
• Not sure.

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If 𝐴 is a 2 × 3 matrix and 𝐵 is a 3 × 2 matrix, can you add the matrices 𝐴 and 𝐵?

• Yes

• No

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Choose the correct option.

• A

• B

• C

• D

• E

• 𝑥=18, 𝑦=4, 𝑧=21, 𝑎=−1, 𝑏=3

• 𝑥=18, 𝑦=4, 𝑧=−21, 𝑎=−11, 𝑏=3

• 𝑥=18, 𝑦=−4, 𝑧=21, 𝑎=11, 𝑏=3

• 𝑥=18, 𝑦=4, 𝑧=21, 𝑎=11, 𝑏=7

Choose the correct option to the calculation.

• A

• B

• C

• D

• E