Use the slope to determine if lines Pq and RS are parallel, perpendicular, or neither. p(-3,14) q(2,-1), r(4, 8), s(-2, -10)

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.