A Rectangular region is removed from another Rectangular region to create the shaded region showed below. Find the area of the shaded region.

Okay so find the area of the big shape.
7x15=105
Now find the area of the small one which is:
5x13=65
And now all you have to do is take away the area of the small box away from the big box. So...
105-65=40... But remember to put in the right form which is cm but since we found the area of 2d shape it's going to be cm2. So.... 40cm2