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?

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.

The base of a triangle is 8 1 3 meters and the height of the triangle is the fourth root of 16 meters meters. what is the area of the triangle?