Answer:
x=1
y=-4
Step-by-step explanation:
Since -x-3=y subsitue that in at the top equation




Plug x=1 back into the equation to solve for y.


We need to see the "given system".
Let me use Python to find the answers
Program.

![\tt Prices=[75,120,120,145,150,150,150,175,175,200,225,275]](https://tex.z-dn.net/?f=%5Ctt%20Prices%3D%5B75%2C120%2C120%2C145%2C150%2C150%2C150%2C175%2C175%2C200%2C225%2C275%5D)



Output:;
- Mean=163.333
- Median=150.0
- Mode=150
Console attached
Answer:
3y=x-1 OR y=⅓x-⅓
Step-by-step explanation:
Lets call the equation y=-3x+7 line l1
the other line passing through (4,1) l2
If two lines are perpendicular,then the product of their roots=-1
That is m(l1)×m(l2)=-1
Slope of l1=-3 therefore slope of l2=-1÷-3=⅓
Now that we have determined the slope of l2 we move on to find it's equation using the point-slope form
y-y1=m(x-x1)
y-1=⅓(x-4)
3y-3=x-4
3y=x-4+3
3y=x-1 OR y=⅓x-⅓