Area=side^2
10-y is the side
(10-y)^2 is area
aera=100-20y-y²
Step-by-step explanation:
ay guey como estas yo no entiendo este tipo de matematica para nerds
I'll answer and write my work out -- I will post a link to the picture. It won't be in a diagram but it will tell you the answer. If you are on mobile you should log onto brainly on a computer so you can copy-paste the link into google
Sry just add a triangle on each side took that test

Let's solve ~




Therefore, Option D is correct ~