If you mean to translate it to Spanish it is División de, resta, multiplicacion, adición
Ms. Bell's mathematics class consists of 14 sophomores,
Ms. Bell create a 4-member committee of sophomores
if each sophomore has an equal chance of being selected
this is a combination

The answer is 1001.I’ve completed answering the question.
The picture is a bit blurry but the perimeter of a shape is the lengths added.
(4a - 2b) + (7a + 3) + (9a - 4) = perimeter, I added the sides together
Combine like terms to get:
4a + 7a + 9a = 20a
-2b is left along becuase there are no other like terms
3 - 4 = -1
The perimeter is 20a - 2b - 1