Ok so lets say we have a system of equations:
y = x + 1
x + y = 5
All you would do is plug in what is equal to the variable so:
x + x + 1 = 5
Then you would just simplify and solve
2x + 1 = 5
-1 -1
_________
2x = 4
-- --
2 2
x=2
5n-4
Just plug numbers into it. Make this a table.
n 0 1 2 3
y 1 6 11 16
Answer:
1/2
Step-by-step explanation:

as you can see it's closest to 1/2
there is just a 0.1 of difference
Answer:
42857142857
Step-by-step explanation:
3/7 = 0.42857142857...
Answer:
Set the height up to 4
Step-by-step explanation:
Since there are 4 numbers between 1-5, set the height up to 4