Answer:
the answer is c
Step-by-step explanation:
 
        
             
        
        
        
Answer:
1). y= -5+3x
2). y= -2x-13
3). y= -6x+2
4). y= -x+4
5). y≈ 0.57x
6). y=2x-9
7). Equation incomplete
8). y=3x+23
Step-by-step explanation:
1).
3x-y=5
<em>Subtract 3x from both sides</em>
-y=5-3x
<em>Multiply both sides by -1</em>
y= -5+3x
2). 
y+7= -2(x+3)
y+7= -2x-6
<em>Subtract 7 from both sides</em>
y= -2x-13
3). 
y= -10-6(x-2)
y=  -10-6x+12
y= -6x+2
4). 
3x=12-3y
<em>Add 3y to both sides</em>
3x+3y=12
<em>Subtract 3x from both sides</em>
3y=12-3x
<em>Divide both sides by 3</em>
y= -x+4
5). 
-4x-7y=0
<em>Add 4x to both sides</em>
-7y= -4x+0
<em>Multiply both sides by -1</em>
7y= 4x
<em>Divide both sides by 7</em>
y≈ 0.57x
6). 
4x-2y=18
<em>Subtract 4x from both sides</em>
-2y= -4x+18
<em>Multiply both sides by -1</em>
2y=4x-18
<em>Divide both sides by 2</em>
y=2x-9
7). 
y= 5-
Equation is incomplete.
8).
y-2=3(x+7)
y-2=3x+21
<em>Add 2 to both sides</em>
y=3x+23
 
        
             
        
        
        
Answer:
Field
Field is eroding 4 times faster than the mountain.
Step-by-step explanation:
 = The amount of erosion in millimeters
 = The amount of erosion in millimeters
 = Number of years passed
 = Number of years passed

The rate at which soil is eroding in the mountain is 0.5 millimeters per year.
The rate at which the field is eroding is 2 millimeters per year.
The field is eroding faster than the mountain.

So the field is eroding 4 times faster than the mountain.
 
        
             
        
        
        
Solve the first equation for y to compare it to the second equation because the second equation is in terms of y. 

Since the first equation simplifies and is the same as the second equation, they are identical equations and their lines when graphed will also be identical.