Simplify the expression 5+4 times (8-6)^2

Construct the graph that models the given situation

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?

Use pascal's triangle to find the missing values. x4 - 4xb + 6x2 - ax + 1