(x+y) ²+(x-y)²+(x+y)*(x-y)

This question consists of 2 parts, a and b. marco got a quotient of 70 when he divided 49 by 0.07. part a what is the correct answer to this problem? part b what mistake did marco make? you!

Given: pqrs is a parallelogram prove: pr and qs bisect each other at t

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?