Answer:
20. The sum of a number and ten is three times the number
21. The sum of the product of two and a number and the product of four and another number is twenty
22. Four times the sum of a and b is the product of nine times a
23. The product of six and a number subtracted from eight is the sum of four and two times a number
24. The difference of the square of s and the square of n is equal to the product of two and b.
25. d
26. f
27. c
28. b
29. a
30. e
31. Real, Irrational
32. Real, Rational, Integer
33. Real, Rational
34. -
35.-