16. Translate "Flve times a number z decreased by six is 29." in mathematical sentence. 17. Translate, n + 12 = 15 into verbal sentence 18. What is the degree of polynomial in the expression, 3xºy?? 19. What kind of polynomial according to the number of terms is 4x2 - 7x + 3? 20. In the algebraic expression 9mº + 4. what is the constant term.