What is the equation of the line that goes through (-7, 2) that has no x-intercept?

The rows and columns of lattice points in a three-by-three square array are evenly spaced one unit apart. how many distinct triangles with at least one side of length 2 units can be drawn using three lattice points for the vertices?

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

Prove that 16^4-2^13-4^5 is divisible by 11.