How to find the length of the side of a rhombus when given perimeter and angle?

If i have 20$ and i gave 5$ away how much i got

State one method by which you can recognize a perfect square trinomial.

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.