I need help solving questions 5,7,9, and 11 please

3. Every square matrix has an inverse. 4. A matrix that is not square can still have an inverse. 21 23 ( 25 2 . 2 Practice and Explorations Decide whether the given matrices are inverses of each other. (Check to see if their product is the identity matrix I.) 3 -1 5. and [1-4] 5 3 6. -5 2 and 2-7] L-2 (2 6 -1 2 7. and 12 41 2-4 -1 2 -5 -2] 8. and 3 -5 1-3 -1] 2 0 11 1 1 -1] 9.1 1 2 and 0 1 0 LO 10 -1 -2 2] ro 1 0 [1 0 1] 10.0 0-2 and 1 0 0 Li - 1 0 LO -1 0 [133] 7 -3 -37 11.1 4 3 and -1 1 0 4 -1 0 1 007 i 0 0 12. -1 -2 3 and 0 0 1 0 1 0 13. Does a matrix with a row of all zeros have an inverse? Why? 14. Matrix A has A as its inverse. What does (A+)-equal? (Hint: -1 Experiment with a few matrices to see what you get.) S fi d 3 3 a 3 a