Evaluate the following vertices for the function f(x) = x + 2y
(2,6)
(-1,3)
(6,4)

Which system of linear inequalities is represented by the graph?

What is the total surface area of this square pyramid?

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.