6. A hospital needs a supply of an expensive medicine. Company A has the most supply available, 1.3 milligrams, which is twice the difference between the weight of
Company B's supply and Company C's, and 0.9 milligram more than Company C's
supply. How many milligrams can the hospital get from these three companies?

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