Simplify x^2+xy-yx+y^2 + y^2+yz-zy+z^2 + z^2+zx-xz+x^2

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Aplot of land is shaped like a quadrilateral. fences are built on the diagonal to divide the area into 4 sections. what is vi to the nearest tenth? gv = 6.55fv = 5.84vh = 3.27vi = ?