When simplified, which of the following expressions has a coefficient of -3?

-2m + 5m
2m + 5m
5m - 2m
-5m + 2m

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Which is a graph of a proportional relationship?

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are: