Astandard number cube is tossed. find p(2 or even)

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.

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

Which one is the correct answer, and why?