Lesha and Maria spend the weekend studying for upcoming tests. The table lists their scores for the first three math tests of the semester. Part A Maria cannot remember what she scored on the second test, but she knows that the sum of the three tests is 270. Write AND solve an addition equation to determine the score that Maria had on her second test.

Part B An “A” grade will be given to students having at least 450 total test points. There are two more tests to take. Write AND solve an equation that will show the average score Lesha will need to have on the next two tests to finish with an “A”