How do you solve for x in a fraction

Which ordered pair (c,d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

The table shown below gives the approximate enrollment at the university of michigan every fifty years. how many more students were enrolled at the university of michigan in 1950 than in 1900?

Wholesome food company has been hired to design a healthy menu for the cafeteria at ridgemont high school. they want to conduct a survey to determine what percentage of ridgemont’s 15001500 students like broccoli. the survey will ask, “do you like broccoli? ”