Answer:
a + c = 150
Step-by-step explanation:
adults + children = 150
a + c = 150
so to find the number of adults we need to subtract the number of children from the total number of attendees.
a + c - c = 150 - c the the number of adults is
a = 150 - c
One specific triangle CAN be made with those angles because of the 180 degree total.
If you take , then by the chain rule
so the answer is A.