9 The quantity y is partly Constant and partly varies inversely as the square of x. when x=1,y=11 and when x=2 and y=5
find the relationship between x and y
find the value of y when x=4.​

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.