Answer:
Plessy v Ferguson
separate but equal
upheld a Louisiana state law that allowed for "equal but separate accommodations for the white and colored races."
Brown v Board of Education
violate the equal protection clause of the 14 ammendment
the supreme court ruled that separating children in public schools on the basic of race was unconstitutional.
D.C v Heller
2nd amendment
the ban on registering handguns and the requirement to keep guns in the home disables or nonfunctional with a trigger lock mechanism violent the 2nd.
Step-by-step explanation: