Halle el promedio de los valores máximos y mínimo de la función f(x, y) = 2x + 5y +6, sujet la región S={(x, y) RxR: [2-2] + [y-2]} 3}

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.