(Solved): A pitcher's earned run average is calculated using the function A(N, I) = 9 (4), where N is the to ...

A pitcher's earned run average is calculated using the function A(N, I) = 9 (4), where N is the total number of earned runs given up in I innings pitched. Find A?, A2, A3, and A4. (Use decimal notation. Give your answers to two decimal places.) A? (3, 13) = A? (5, 7) = A3(4, 11) = A4 (5, 14) = Let f(x, y) = 3x²y + 4x + 6. Evaluate f(2, 3). (Express numbers in exact form. Use symbolic notation and fractions where needed.) f(2, 3) = Evaluate f(x + d, y). (Express numbers in exact form. Use symbolic notation and fractions where needed.) f(x + d, y) = Evaluate f(x, y + d). (Express numbers in exact form. Use symbolic notation and fractions where needed.) f(x, y + d) = Let f(x, y) = 7x² + 3xy + 4y², where x = x(1) = 1 and y = y(t) = 1². Find f(x(2), y(2)). (Give an exact answer. Use symbolic notation and fractions where needed.) f(x(2), y(2)) = Let f(x, y, z) = 6xy sin (62) – 3yz sin (7x). Find fx(x, y, z), fy(x, y, z), and fz(x, y, z). (Use symbolic notation and fractions where needed.) fx(x, y, z) = fy(x, y, z) = fz(x, y, z) =