Let {an}n=1 be a sequence and let sn =Xnk=1ak. If sn = 2n + 1 for all n ≥ 1, calculate a3.

What is the slope of the equation y =

Aline passes through (1,-5) and(-3,7) write an equation for the line in point slope form rewrite the equation in slope intercept form

This size running track is usually called a 400 meter track. however if a person ran as close to the inside as possible on the track they would run less than 400 meters in one lap. how far away from the inside border would someone have to run to make one lap equal exactly 400 meters