Need help asap whoever helps big thank you!

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units

Juanita wade's new car has an msrp of $28,902.11 including title and processing fees. the premier package which includes surround sound and dvd player costs three times the amount of the in-style package which includes leather seats and select wheels. the total cost of her new car was $34,290.08 which included the 6.5% sales tax. find the cost of the premier package to the nearest cent.