Me idk how to solve it.
simplify: (sin θ − cos θ)2 − (sin θ + cos θ)2

−4sin(θ)cos(θ)
2
sin2 θ
cos2 θ

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.

What is the base of 1/9 to the power of 2

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap