Can anyone me with these three problems?

9/10 divide by -3/15 as a mixed number

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

Determine if the equation defines y as a function of x: 2xy = 1. yes o no