What is an explicit formula for the following recusive formula an=an-1+7;a1=2

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost