Melissa prepared 9 kilograms of dough after working 3 hours. How many hours did Melissa work if she prepared 24 kilograms of dough? Assume the relationship is directly proportional,

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no