If z=15cm and x=17 cm what is the length of y?

Why are constitutions, both federal and state, necessary for our government?

At the time of the brown v. board of education decision,schools were segregated everywhere in the country.several states had laws requiring segregated schools.schools in nearly every state has been desegregated.segregation was common in the north, but not in the south.

Plz . explain what shopping was like in london during the early 1900s. how does this differ from the modern shopping experience?