The discount was 12 dollars off. You first subtract $530 from $650 & you'll be left with $120 . Then since it was you and 9 friends, that's a total of 10 people. So you divide 120 by 10 . Leaving you with the answer : $12 off which is the discount.
Answer: 15
Step-by-step explanation:
By the trapezoid midsegment theorem,

30.6 because 10.2 times 30 is 30.6
the answer that you are looking for is d