Which are pairs of vertical angles? ∠COB & ∠COA
∠COB & ∠COA

∠BOD & ∠AOD
∠BOD & ∠AOD

∠COB & ∠AOD
∠COB & ∠AOD

∠AOD & ∠AOC

Data are collected to see how many ice-cream cones are sold at a ballpark in a week. day 1 is sunday and day 7 is the following saturday. use the data from the table to create a scatter plot.

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

James wants to promote his band on the internet. site a offers website hosting for $4.95 per month with a $49.95 startup fee. site b offers website hosting for $9.95 per month with no startup fee. for how many months would james need to keep the website for site a to be a better choice than site b?