If $m \Diamond n = (m^2 - n) \div n$ for all real numbers $m$ and $n$, where $n \neq 0$, what is the value of $6 \Diamond 3$?

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Which ahows the graph of the solution set of 6x+4y< 12

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling