Someone help me who got answer ?

Passengers usually start to board their flights 1 hour before the scheduled take off time. the gate will be closed 15 minutes before the takeoff time. jack’s plane is scheduled to take off at 12: 05 a. m. if he arrives at the gate at 11: 45 p. m., can he board the flight?

How do you solving the solution of each system using elimination?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class