I need help understanding this hopefully you guys can help me with this! :D 1)Find the solution of the following system of equations; express the answer as a coordinate pair (x, y):

y = x + 3

y = -2x - 3

2)Find the solution of the following system of equations; express the

answer as a coordinate pair (x, y):

y = 2x + 1

y = x/2 + 4

3) Find the solution of the following system of equations; express the

answer as a coordinate pair (x, y):

y = -3x + 6

y= -1/2x+1

(-2, 1)  

(2, 5)  

Please solve the third question and answer in the comments and I will tell you if you are correct.

Step-by-step explanation:

1)Find the solution of the following system of equations; express the answer as a coordinate pair (x,y):

y = x + 3         subtract from the bottom  and solve for x

y = -2x - 3    

y - y = x - (-2x) + 3 - (-3)

  0  =  3x + 6

 -6  =  3x

-2  =  x

 y = x + 3     y = -2 + 3     y = 1      (-2, 1)

2)Find the solution of the following system of equations; express the

answer as a coordinate pair (x,y):

y = 2x + 1              subtract from the bottom  and solve for x

y = x/2 + 4

y-y = 2x - 1/2 x +1 - 4

 0  = x(2-1/2) - 3

 3  = 1.5x

 2  = x          y = 2x + 1      y = 2(2) + 1       y = 5       (2, 5)

3) Find the solution of the following system of equations; express the

answer as a coordinate pair (x,y):

y = -3x + 6          subtract from the bottom  and solve for x

y= -1/2x+1            

y-y = x(-3 - (-1/2)) + (6 - 1)       follow the examples above

i dont know

step-by-step explanation:

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls