Help thank you , 10 points please answer correct

Lines p and q intersect. find the value of b. show your work. cite any theorems you use.

Which choice represents the sample space ,s for this event

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.