6.which of the given expression is NOT a rational algebraic expression
7. What is the quotient of and ? 85 4ab2 8. What is the sum of and ? 2x+3 3x-6 9.The difference of and is equal to X+2 x+2 10. Mark can paint the room in 6 hours, while Louie can paint the same room in hours. If they will work together, in how many hours can they finish painting the room?​