Doing old work anybody wanna help

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

Use set buikder notation to represent the following set: {, -2, -1, 0}

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?