Find the value of x and find the value of the angle with a star in it​

Which of the following is the result of expanding

X+y=-4 x-y=2 use elimination with adding and subtraction

In which quadrant does the point lie? write the coordinates of the point. a. quadrant ii; (–2, –4) b. quadrant iii; (2, 4) c. quadrant iii; (–2, –4) d. quadrant iv; (–4, –2)