Consider the relation on Z×Z defined by (m, n)R(m′,n′) provided that m+n′ = m′ +n. Prove that this is an equivalence relation.

Abe is a triangle. can you use the sss postulate or the sas postulate to prove triangle abc = triangle aed? by sss only neither apply both apply by sas only

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?

Janice determined there were 10 possible outcomes when tossing two coins and spinning a spinner numbered 1 through 6. what is the correct number? what might have been janice's error?