Hi, I could use some help on two problems that my teacher gave out. I'm a Sophomore in Algebra II if it helps. My teacher encouraged us to find help anywhere so you don't have to feel like you're helping me cheat or anything like that.

1. What is the largest value of m such that the graph of the equation y=mx meets the graph of the equation (x-10)^2 + (y-5)^2 = 4

2. If L@K = L+(K/L), then find L@(L@K)

My friends and I have worked on these two for awhile now and are stumped, any help is appreciated. Thanks.