Answer:
The number of children's tickets sold was 27
Step-by-step explanation:
Let
x ----> the number of children's tickets sold
y ----> the number of adult's tickets sold
we know that
----> equation A
----> equation B
Solve the system by substitution
Substitute equation B in equation A

solve for x



therefore
The number of children's tickets sold was 27
I think #4 is 4 but I'm not completely sure
Answer: 3/2
Step-by-step explanation:
12/8=3/2
Step-by-step explanation:
B
1100
To find the sum of the first n terms of an arithmetic series use the formula,
S
n
=
2
n(a
1
+a
n
)
S
20
=
2
20(10+100)
S
20
=
2
2200
S
20
=1100
8 5 and 18 8
7 2 9 2
8 - 5 = 3, 8 - 7 = 1, 5 - 2 = 3 and 18 - 8 = 10, 18 - 9 = 9, 9 - 2 = 7, 8 - 2 = 6