how do I solve this when there no number at the beginning?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Find the distance between (7,-6) and (-3,-9)

Asystem of linear equations contains two equations with the same slope. select all of the correct statements. i a. the system may have two solutions. - b. the system may have infinitely many solutions. c. the system may have one solution. o d. the system may have no solution. submit