What is the difference between secant and tangent line?

Abcd is a parallelogram. the diagram is not drawn to scale. if m

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

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?