Which digits can replace the _ to make a true statement?

Brainliest ! which of the coordinates are not of th vertices of the feasible region for the system of inequalities y≤4,,x≤5,x+y> 6 a(2,4) b(0,6) c(5,4) d(5,1)

Me. i can't figure out this question. give an explanation too. .

How do i put 3(x+7) in distributive property