Solve the system of equations by graphing
x+y=-7
2x + y = 6

The red line is x+y=-7

The blue line is 2x + y = 6

(13, -20) is the solution

x=13, y=-20

Step-by-step explanation:

x+y=-7

2x+y=6

Subtract x from both sides of the first equation to be left with y=-x-7. Substituting this into the second equation, you get:

2x-x-7=6

x-y=6

x=13

y=-20

I also solved this graphically, which you can see below. Hope this helps!

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

sorry can't

step-by-step explanation:

i googled though and something came up but it was in science langueage not common english sooo