NEED HELP ASaPp

Plz helplo

I know the answer but I’m not sure with it

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

Tomas used 3 1/3 cups of flour and now has 1 2/3cups left. which equation can he use to find f, the number of cups of flour he had to begin with? f+3 1/3=1 2/3 f-3 1/3=1 2/3 3 1/3f=1 2/3 f/3 1/3=1 2/3

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?