Which expressions are equivalent to x + 2y + x + 2 ?
choose all answers that apply:
a) 2(x + y + 1)
b) 2x + 4y + 4
c) none of the above

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.

Factor -8x3-2x2-12x-3 by grouping what is the resulting expression?

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.