Which is a formula for the nth term of the given sequence 4,-8,16

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

The key on a road map has a scale factor of 1.5 inches = 50 miles. the distance between santa fe and albuquerque measures 7.5 inches. the distance between santa fe and taos is 0.75 inches. what is the actual distance between the cities?