A system of two linear equations has infinitely many solutions. One equation is x - 2y=6. Select the equation that would make this system have infinitely many solutions.
A .x + 2y = 6
B .x-2y = 4
C . 2y-x= -6
D .- 2y + x=4

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