If a dice is to be rolled until all sides have appeared at least once, find the expected number of times that outcome 1 appears. (remark: let n be the number of rolls until all sides have appeared. computing e[n] is what is called a coupon-collecting problem; see section 7.2 in the textbook.)

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

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.

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)