### Home > A2C > Chapter 7 > Lesson 7.3.1 > Problem 7-156

7-156.

Add the numbers in the corresponding entries.

Multiply each entry in matrix *C* by 3.

Multilpy matrices *L* and *C* together to get matrix *LC*.

7-156.

Add the numbers in the corresponding entries.

Multiply each entry in matrix *C* by 3.

Multilpy matrices *L* and *C* together to get matrix *LC*.