How many 2 1/2 inch-long steel stakes can Curtis cut from a piece of steel that is 25 inches long?

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.