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i can't find anything to me on this so write the answer or just explain.

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

What is 1/3x5 on anuber line what does it look like on a number line

Find two numbers if their sum is 91 and the ratio is 6: 7?