Let u=(1, 2, 3, 4, 5, 6, 7, 8), a = {4, 2, 8), b {3, 4, 1, 2), and c=(5, 7, 1). find the following. (enter your answers as a comma-separated list. enter empty for the empty set.) an (bn c) { }

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

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

Can someone explain to me how to do