The height of a triangle is 4x inches and the base is (5x+1) inches. the area of the triangle is 500 square inches. what are the dimensions of the base and height 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.