8. In the following diagram, AB and CD intersect at E. Which of the following transformations can be used to show that AED = BEC ?
(1) a 90° counterclockwise rotation about E
(2) a reflection across AB
(3) a translation that maps A to B
(4) a 180° rotation about E

Which system of linear inequalities is represented by the graph? !

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

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.