The answer is (15,0) because the format is (x,y) so (15,0) means that it is on the x axis only !
The area of the triangle is 3 because b•h/2, and the area of the rectangle is 3 because l•w, added together that equals 6, and doubled that equals 12. So I think the answer is C, 12 square feet.
Hello.
Firstly, let's isolate x on the equation:

Now, we can replace 'x' for 'y' and vice-versa:

Hope I helped.
i think it's 3/4 though i'm not entirely sure