1 negative startroot 2 end root 1 start root 2 end root
        
             
        
        
        
Step-by-step explanation:
hope I understand your qyestion
Equation 1 : R+G=20
Equation 2 : 7R+3G=9
Multiply Equation by 3, it becomes
3R+3G=60 ...... Equation 3
Now Equation 3 minus Equation 2
-4R = 51
R = - 51/4
Sub R into Equation 1, you can find G
 
        
             
        
        
        
Answer: 5y + 4x = - 10
Step-by-step explanation:
Two lines are said to be perpendicular if the product of their gradients = -1.
If the gradient of the first line is  and the gradient of the second line is
 and the gradient of the second line is  , if the lines are perpendicular, them
 , if the lines are perpendicular, them
 x
 x  = -1 , that is
 = -1 , that is 
 =
 = 
The equation of the line given is 5x - 4y = -3 , we need to write this equation in slope - intercept form in order to find the slope.
The equation in slope -intercept form is given as :
y =mx + c , where m is the slope and c is the y - intercept.
Writing the equation in this form , we have
5x - 4y = + 3
4y = 5x -+3
y = 5x/4 + 3/4
comparing with the equation y = mx + c , then  = 5/4
 = 5/4
Which means that  = -4/5 and the line passes through the point ( -5 , 2 ).
 = -4/5 and the line passes through the point ( -5 , 2 ).
Using the equation of line in slope - point form  to find the equation of the line;
y -  = m ( x -
 = m ( x -   )
 )
y - 2 = -4/5 ( x +5)
5(y - 2 ) = -4 ( x + 5 )
5y - 10 = -4x - 20
5y + 4x = - 10
 
        
             
        
        
        
Answer:
14
Step-by-step explanation: