Dan has £100. Colin takes £. How much is left

Ineed to know the answer to this algebra question.

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

If the probability of an event happening is 65% then the probability this event does not occur?