Suppose that f ( x , y ) = x 2 − x y + y 2 − 3 x + 3 y , with domain d constrained by the lines y = x , y = 0 , and x = 3 . the critical point of f ( x , y ) restricted to the boundary of d , but not at a corner point, is at ( a , b ) , where a and b . the absolute minimum of f ( x , y ) is and the absolute maximum is 9 correct .

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?