I need help with this if you get it right I will mark you as brainlest

Write an explicit formula that represents the sequence defined by the following recursive formula:

Barbara's piano instructors house is 7 1/8 miles from her house. after biking for 1 3/4 miles she stops to rest how much longer does she need to bike to reach her instructor's house

Tiara buys the pizza shown below: a circular pizza is shown. the edge of one slice is marked ab. what does the curve ab represent?