There are a total of 11 ducks and goats in the barn. There are 34 legs in all (each duck has two legs and each goat has four
legs).
Use substitution to solve the linear system of equations and
determine how many ducks, x, and goats, y there are. Express
the solution as an ordered pair (x, y).

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio