Need asap not sure how to do this plz

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

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

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show