Can someone Help me with this?!?
Will give crown!!

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?

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.