X+2y=5 x-3y=7 what is the value of the system determinant? a) -5 b) 1 c) 5

The answer is B) 1

Step-by-step explanation:

x-2y=5               x-3y=7

+2y=+2y

x-0=5+2y

x=5+2y

This problem says x is 5+2y, so substitute 5+2y for x in the other problem:

x-3y=7                   1. Put 5+2y in place of the x:

(5+2y)-3y=7           2. Now, remove the parenthesis:

5+2y-3y=7             3. Combine the y's:

5-y= 7  (2y-3y=-y) 4. Solve for y:

-5  =-5

0-y= 2

- (1)y=  2

     -1

y=-2                

5. Now that you know y is -2, you can put it in your problems to solve for x:

x-3y=7                   x-2y=5

x-3(-2)=7               x-2(-2)=5

x+6= 7                  x+4= 5

  -6=-6                    -4=-4

  x=1                       x=1

ok so the answer to your question is simple as long as you look at the different dimensions that contain the exemplary letters that combined in the right order give you words that eventually within the 5th dimension will conform and give you the correct answer to your question. hope i , stop looking at this easily, look at it with a spectral view.

step-by-step explanation:

told you

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.