Middle of -6 and 4 is -1
middle of 4 and 8 is 6
answer: (-1, 6)
When they graphically intersect, the two equations are equal and we can say that y=y so:
4x+2=x+5 subtract 2 from both sides
4x=x+3 subtract x from both sides
3x=3 divide both sides by 3
x=1, which makes y=x+5 become:
y=1+5=6, so the solution to the system of equations is the point:
(1,6)
The only graph containing this point is the top one on the first page...
This system of equations has an infinite number of solutions.
2.3
2 4/5= 2.8
3.01
3.017
3.10
4 1/8= 4.125
4.2
For some number

, there are

red marbles and

blue marbles in the bag.
So the total number of marbles is

.
This means that the total number of marbles can be any multiple of 7.
(Note that for other cases, you would need to reduce the ratio to lowest terms and then use this method.)