Matrix Operations Quiz

What is a matrix?

• A single number enclosed in brackets

• A list of random numbers

• A rectangular array of numbers or algebraic expressions

• A type of movie from the 90s

Which of the following is NOT a characteristic of a matrix?

• Enclosed in square brackets

• Contains full rows and columns

• Can include names like Matt or Kara

• Is a rectangular array

How are the dimensions of a matrix defined?

• By the number of elements

• By the type of numbers

• By the number of rows and columns

• By the size of the numbers

What must be true for two matrices to be added or subtracted?

• They must be square matrices

• They must have the same number of elements

• They must contain only positive numbers

• They must have the same dimensions

When adding matrices, what is the process?

• Add all elements together

• Add corresponding elements

• Add only the last column

• Add only the first row

What is scalar multiplication?

• Adding a constant to each element

• Multiplying each element by a constant

• Dividing each element by a constant

• Subtracting a constant from each element

How does scalar multiplication relate to the distributive property?

• It is unrelated

• It is similar because each element is multiplied by the scalar

• It is the opposite

• It involves addition instead of multiplication

In the operation 3A + D, what should be done first?

• Subtract matrix D from A

• Multiply matrix D by 3

• Multiply matrix A by 3

• Add matrices A and D

Why can't matrices with different dimensions be added?

• They don't have the same number of elements

• They are not rectangular

• They can be added

• They are not enclosed in brackets

What is the result of multiplying a matrix by a negative scalar?

• The matrix elements are negated

• The matrix becomes zero

• The matrix becomes positive

• The matrix elements are unchanged