Explained the mistake and correct answer in photo.
Answer:
Length = 45.37 in
Width = 30.56 in
Step-by-step explanation:
Let the width of the picture be 'w' inches.
Given:
Perimeter of the picture is, 
Length is 15.75 inches shorter than twice the width. So, length is:

Now, we know that the perimeter of a rectangular shape is given as the sum of all of its side. So, the picture is also of rectangular shape and hence the perimeter is given as:

Plug in the values of 'l' and 'P' and solve for 'w'. This gives,

Therefore, the width of the rectangular picture is 30.56 inches.
Length of the picture is, 
So, length of the picture is 45.37 inches and width is 30.56 inches.
I’m not sure but i think the answer is 1124.28 to 2 decimal places.
Answer:
See attached image. 82 and 98 degrees.
Step-by-step explanation:
On attached document.
You can conclude that x is less than y, because a smaller number - a bigger number is equal to a negative number. :)