### Home > A2C > Chapter 7 > Lesson 7.3.3 > Problem7-187

7-187.
1. Perform each of the following matrix operations without using a calculator. If the operation is impossible, explain why. Homework Help ✎

What have you learned about matrix operations so far?

What must be true about the dimensions of two matrices in order to multiply them?

Multiply through by the 2 before you add.

What must be true about the dimensions of two matrices in order to add them?