What is 7+7-4+8 dived by 3

What are the sotions to the quadratic equation 9x^2=4

Reading tests are compared for two students. sara got 98, 100, 65, 78, 98, 46, 100, 100, 45, and 50 on her reading test. lee got 97, 67, 89, 99, 100, 45, 79, 89, 58, and 67 on his reading test.

Iknow the answer but the calculator doesn't seem to give the right one