solve the system by subtracting the equations

Step-by-step explanation:

3. 2x + 5y = 190

   2x + 3y = 130

subtract 2 equation

     2x + 5y = 190

--    2x + 3y = 130

     0x + 2y = 60

               y = 30

substitute y for 1 equation:

2x + 3( 30 ) =130

2x  + 90 = 130

2x          = 130-90

 2x       = 40

    x=     20

4.  6x + 3y = 24

    6x - 2y  = 14

subtract 2 equation

we got y=2

6x - 6x = 0

3y- -2y = 5y

24-14=10

10/5 = 2

substitute y for 1 equation you want

6x - 2(2)= 14

x             = 3

the answer is d. (1.2, -4.7) on edgn

hope this !

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c