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The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

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

Solve the system of equations. x=-2y+1 and x+2y=9. show work