Translate in problem into algebraic expression. "the difference between twice a number and 4"

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

Agrid shows the positions of a subway stop and your house. the subway stop is located at (-5,2) and your house is located at (-9,9). what is the distance, to the nearest unit, between your house and the subway stop?