Thank you for the opportunity to help you with your question!

In order to multiply a scalar by a matrix we just need to multiply all the elements (or numbers) of the matrix times the given scalar. So then we would have:

5 - 4 7 4(5) 4(- 4) 4(7) 20 - 16 28

E = 3 4 - 3 --------------------> 4E = 4(3) 4(4) 4(- 3) -----------------> 4E = 12 16 - 12

6 1 1 4(6) 4(1) 4(1) 24 4 4

Final answer:

20 - 16 28

4E = 12 16 - 12

24 4 4

Please let me know if you need any clarification. I'm always happy to answer your questions.