HURRY AND PLZ HELP WITH THIS ONE 15 OR MORE POINTS for CORRECT ANSWERs

Really need on these. i have no idea what to do

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

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.