What is the maximum value o fx y subject to the condition x+y=8 ?

What is the maximum value of xy subject to the condition x+y=8 ? a)8 b)16 c)20 d)24

Find the maximum value of x+y subjected to the condition 4x+3y le 12, 2x + 5y le 10, x le 0, x ge 0, y ge 0 .

The maximum value of xy subject to x+y =7 is

The maximum value of xy subject to x+y=7 , is

The maximum value of xy subjects to x+y =7 is