What is 20/10 as Mixed number

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18

How can you tell when x and y are not directly proportional?