All of the start out with one and then add 2 from there and they add a block on top
The formula of an area of a square: 
a - side
We have: 
substitute:

The fromula of a perimeter of a square is: 
substitute:

X = number of flyers
50+0.05x=100
0.05x=50
x=1000 flyers
Answer:
1. 42/x
2. 14 students
Step-by-step explanation:
1. 42 divided by x
x=students on trip last year
2. 42 divided by 3
42/3=14 students this year
Answer: 1,040
Step-by-step explanation: Just find 26 of 40
26*40=1040