Please help!! Look at the picture for the question

140

Step-by-step explanation:

A triangle equals 180 and you subtract 180 to 15 and 25 and you get 140.

The length is 125 and the width is 250 for a maximum area of 3125.

Use the equations A=L*w and 500=2L+w (the second one represents perimeter)

The second one can be rewritten as w=500-2L and this can be plugged into the first to get A=L(500-2L), which can be rewritten as 500L-2L^2

You then take the derivative to get A'=500-4L and set this equal to 0 to get a maximum area. 
500=4L
L=125 and plug this into the original to get W=250 and A=3125

Hope this helps