The other person is literally wrong. The answer is D. Supplementary because two angles that add up to 180 are supplementary angles.
ok so to start combine like terms in the problems meaning you combine the numbers that have the same variable like 7x and 3x etc.
Answer:
307/500
Step-by-step explanation:
negative multiplied by positives = negative numbers
3 x 5 = -15
negative multiplied by a negative = a positive number
-3 x -2y = +6y
so combine both gets -15 +6y
or a better way to write it is 6y-15