Answer:
7 + x + 4y
(7 + x) + 4y
x + (7 + 4y)
Step-by-step explanation:
the sum of elements does not change, no matter the order.
Find the lengths of the sides. Determine how long a right triangle side lengths are.
I think it's equal to 1 because every expression with the exponent of zero is equal to 1, idk for sure though
