Learning Goal: I’m working on a linear algebra exercise and need an explanation

Learning Goal: I’m working on a linear algebra exercise and need an explanation and answer to help me learn.I have attached 2 documents of screenshots in pdf with the questions. Please send in the answers ASAP! (No workings required, just the final answer)I NEED THE CHAPTER 7 ASSIGNMENT BY TONIGHT, 11:00 PM EST !PRACTISE FINAL CAN BE SUBMITTED NEXT WEEK 🙂