Identify a pair of opposite rays.

If you roll two fair dice (one black die and one white die), in how many ways can you obtain a 4 on at least one die?

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?