What’s the answer? I don’t know

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?

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

Plzzz i beg u so much asaaaap ! what is the slope of this line? enter your answer in the box.