Ack's mother gave him 50 chocolates to give to his friends at his birthday party. he gave 3 chocolates to each of his friends and still had 2 chocolates left.

16 because 48/3 = 16 and we know that he started with 50 chocolates then distributed 3 times the number of friends present. This is written as 50 - 3x. We also know that there were 2 chocolates left so -3x = 2 - 50 which when simplified is x = 48/3 which equals 16.

Step-by-step explanation:

The answer is correct and the reasoning is fine. I'd mention that that corresponds with angle and since and form one side of a line, they are supplementary (add up to 180 degrees). Therefore, .Your reasoning is correct as well, but maybe just add on and explain that because they are vertical angles.

In addition, I have a hard time believing a computer will be able to grade the reasoning portion of the question well. It's entirely possible it isn't giving you credit for that because it needs to be manually graded.