What is the value of tangent at (-rad3/2, 1/2)?

What is the value of the digit 1 in the number 13?

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.

Tom drove 206 miles in 3.9 hours. estimate his average speed.