What is the answer I need help?

In the rectangle below ac=30 units what is de

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

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.