The sale price of every item in a store is 85% of it's usual price. The usual price of a backpack is 30$, what is it's sale price?

When the ball has traveled a distance of

Me asap on # : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.

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.