It costs the school band ss dollars per sandwich that they make. the band sells each sandwich for 20\%20% more than it costs to make so they earn a profit. the expression 73(s+0.2s)73(s+0.2s) describes how much money the school band received selling sandwiches at their last fundraiser.

Money Required for making 1 Sandwich that is Cost Price of 1 Sandwich = S Dollar

Selling Price of 1 Sandwich = 20 % more than Cost Price S

                    = S + 20 % of S

                     =

                     =$ 1.20 S

                      = $(S + 0.20 S)

Selling Price of 73 Sandwiches = $ 73 (S + 0.20 S)

The expression $73(S+0.2 S) →→  Selling Price of 73 Sandwiches          

point a is the center of the circle that passes through points e, f, and g and the center of the circle that passes through points x, y, and z.