Which is the simplified form of the following expression? 7x - 9y + 4x^2 - 2x + 12y A. 13x + 3y

B. 11x + 21y

C. 4x2 + 5x + 3y

D. 4x2 + 9x + 21y

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.

If wxyz is a square, which statements must be true? plz < 3

What is the distance between points a and b?