Given expression : 
According to the Commutative property of Addition
For any
:

Therefore, the given is equal to: 
Also, by the Commutative property of Multiplication
For any
:

Therefore, the given is equal to: 
The constant potion contains no variables ( no 'x')
So its 16
Answer:
Alternate interior angles have the same measure. As we know that 'angle 1 ' and 50° are alternate interior angles hence they must be equal. Also we now that sum of all the angles of a triangle is equal to 180°. Hence, m∠2=15°
Step-by-step explanation:
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