Hello,
I suppose equations are:
x+y=3 (1)
x+2y=9 (2)
(2)-(1)==>y=6
(1)==>x=3-6
x=-3, y=6
Sol={(-3,6)}
Answer:
C
Step-by-step explanation:
I typed it into a graphing calculator. You could also choose a point (I choose (4,0) ) then plug it into each equation In the answers until you get back the numbers of the point you choose to represent x and y. For example
Domain (the range of x values)
Range (the range of the y values)
Domain: (-9, 11)
Range: (-4, 6)
The answer was : <span>0.00753768844 I did have to use a calculator for that and I hope that was ok. ;)</span>