82, 84, and 86 are your three consecutive even integers.
We can calcualte the number of blue hats by multiplying the total number of hats (n=48) by the proportion of blue hats (p=25%=0.25).
Then:

There are 12 blue hats.
a to C would be 4 3/4 + 2/3
3/4 + 2/3 = 9/12 + 8/12 = 17/12 = 1 5/12
1 5/12 + 4 = 5 5/12 total distance
4(x-3) + 2(x+1)
4x-12+2x+2
6x-10
6(3x-1) - 3(x-5)
18x-6 - 3x+15
15x-21
Answer:
I think last one, not sure
Step-by-step explanation: