Mr tan buys 4 white pine trees and 5 birch trees. what is the cost of the trees?

How to determine whether two known pairs of points are on the same line.

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?