Elsa is participating in a 5-day cross-country biking challenge. She biked for 54, 46, 67, and 60 miles on the first four days. How many miles does she need to bike on the last day so that her average (mean) is 55 miles per day?

If set d is not the empty set but is a subset of set e, then which of the following is true? d ∩ e = d d ∩ e = e d ∩ e = ∅

The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?

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.