Write an equation and solve for the variable indicated?

9. ten plus eight times a number a equals eleven times another number d minus six. solve for a.

10. three fourths of a number p less two is five sixths of another number r plus five. solve for r

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