Question

Please help with all of these!!

Answer 1

16. r = 10√2 , s = 10
17. n = 30 , p = 15 , q = 15√3
18. a = 4√3 , b = 2√3
19. x = 45 , y = 12√2
20. x = 5
21. x = 4√6

22. B
23. B