(X^2+2xy+y^2)(x+1) solve and show all work

Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps