Erica has a 18% discount coupon for an electronics store. she sees a new television that she wants to buy. after the 18% discount was applied, erica paid 492 dollars for the television. what's was the original price of the television

Ineed to know how to write question one in mathematical terms

An incoming airplane is x miles due north from the control tower at an airport. a second incoming airplane is y miles due east of the same control tower. the shortest distance between the two airplanes is z miles. which of the following functions would best model the situation above?

Use corrrct notations to name the sides