Someone please help me answer this. Will give brainliest.

Measures of the angle of r, 31 s (x+4) t (3x+9)

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8

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