Answer:
y=-2x+4
Step-by-step explanation:
the y int is (0,4), so b in y=mx+b is 4
the slope is -2, so the m in y=mx+b is -2
so, y=-2x+4 is your equation
this is system of equations
2x + 5y = -1 times this one by 5 to make the y's opposite
-10x -25y = 5
10x - 25y = -5 (this is it times by 5, now add them)
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0 + 0 = 0
now since everything cancels and both sides are equal it has infinite solutions beaus they are actually the same line.
Answer: 
This is the same as saying 18*sqrt(2) or you could say 18√2
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Explanation:
We'll be using this square root rule: 
So we could have this as our steps:

Therefore, 
The basic idea is to first combine the roots using that rule. From there, we factor the radicand such that we pull out the largest perfect square factor. This will allow us to break the root apart and fully simplify it.
5x-3-7=9+2x-16
5x-10=2x-7
5x-2x=-7+10
3x=3
X=1
Step-by-step explanation:
In figure below what???