One lighthouse flashes every 10 seconds, a second lighthouse flashes every 8 seconds. if they flash at the same time, how long will it take to flash at the same time again? a

Does anyone know how to do geometryme with this problem

Rounded to the nearest tenth, what is the value of x

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.