In an attempt to factor using a GCF, Mia wrote 8x^2 + 4x = 4x (2x - 0), which is not correct. a) how could she check her work? b) what error did she make? c) what is the correct answer? (Not part of question) I believe the (2x - 0) should be (2x + 0) am I right?

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.