What is true about the sum of the two polynomials?

6s2t – 2st2

4s2t – 3st2

The sum is a binomial with a degree of 3.

Henry worked 12 hours and samuel worked 8 hours. if the ratio of their hours is 3: 2, henry's hours have to be slightly over 1/2 the total hours. 20/2 equals 10, so let's try 12 for the "slightly over." if henry worked 12 hours, then samuel will have worked 8 hours. 12/4 is 3 and 8/4 is 2, so the ratio is 3: 2. 12 plus 8 equals 20, so the total hours is also correct.