Which fraction correctly completes the equation

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

For the equations below which statement is true ? -2x=14 6x=-42

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