Exercises: Multiply Matrices by Scalars

Work through each section in order. Show your work where indicated.

Grade 9·18 problems·~25 min·Common Core Math - HS Number and Quantity·standard·hsn-vm-c-7

Work through problems with immediate feedback

Fluency Practice

Matrix $B$ has dimensions $2 \times 4$ . Which statement about $cB$ (for any nonzero real $c$ ) is always true?

The dimensions of $cB$ depend on whether $c$ is positive or negative.

The dimensions of $cB$ are $2 \times 4$ .

The dimensions of $cB$ are the same as the dimensions of $c$ , which is $1 \times 1$ .

The dimensions of $cB$ are $2c \times 4c$ .