The answer is C (-2.2, -3).
In order to find the ordered pair we must use what we know from the first equation in the second. We already know that y = -3, so that goes into the second equation.
y = x - 0.8
-3 = x - 0.8
-2.2 = x
You do 6 times one third or if there is a decimal point for it multiply it that way either one is up to you. But, when you figure out the answer to the multiplication problem be sure to multiply the answer twice by itself.
So.... notice the picture below
we know when y = 140 and x = 240, r = 250
so let's use the pythagorean theorem

now... how much time does the controller have? well, say, plane "y" is going at dy/dt of 140mph, and is 70 miles away, 140 is 2*70, so it can cover those 70 miles in 1/2 hr, and when it does, it'll collide with the other,
so, the controller has that much, less than 1/2 hr
Im not too sure but I think its 4.6,because 1 in :.5 mile. As a whole, .5 can go into 2, 4 times, then whats left over also gets divided into .6. Add those together and youll get 4.6