What kind of proof requires you to prove that all but one of a set of possible alternatives are falsea. direct proofb. elementary proof c. indirect proofd. scientific proof

7x+8y=-18, 4x-9y=-3 solve the system of equations

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

Which fraction is equal to 1hole and 2/5? a.3/5 b.75 c.57 d.73