Hello!
Let 'a' stand for adult tickets and 'c' for children tickets.
a + c = 15
(Both adult and children tickets make up a total of 15 tickets).
30a + 20c = 330
a = 3
c = 12
A N S W E R:
William bought 3 adults tickets and 12 children's tickets.
1/5 over 1/65 hour. as in 1/5 divided by 1/65 hr
Answer:

Step-by-step explanation:
Answer:
4/57
Step-by-step explanation:
Prob=DC/SS
=4/53+4
=4/57
Well all triangles have an area of 180 degrees, therefore X=39 because 102+39=141 and 180-141=39.