Question

2.) Consider the following equations:

−x − y = 1
y = x + 3

If the two equations are graphed, at what point do the lines representing the two equations intersect?
(−1, 2) - answer?
(−2, 1)
(1, −2)
(2, −1)

Answer 1

Hello,
let's try by elimination

x+y=-1
y=x+3
We put the value of y into the first equation

x+(x+3)=-1
==>2x=-4
==>x=-2
So with the second equation, y= -2+3=1

Answer is B (-2,1)