If you are dealt 4 cards from a shuffled deck of 52 cards, find the probability of getting three queens and one king. (Round to six decimal places as needed.)

Give me the equations of two lines that have the same slope but are not parallel.

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?

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.