I need that you solve this word problem in elimination method or any

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

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.