The ordered pair to complete is not included...
To complete the ordered pair, take the given number, let's say it is (?, 3): x = ?, y = 3
Start by substituting it in for y, and solve for x
y = 4 - 5x (rearranged to slope-intercept form for simplicity)
3 = 4 - 5x
-1 = -5x
x = 1/5 = .2
The completed pair is now: (.2, 3)
For another example, let's take the given number as (8, ?), x = 8, y = ?
y = 4 - 5x
y = 4 - 5 x 8
y = 4 - 40
y = -36
(8, -36)
y=(-1) x=(2)
x = 2 and y =-3 so the lines intersect at (2, -3)
Although no incomplete ordered pairs have been shown they can be readily solved.If x + y - 1 = 0, then x = 1 - y, also y = 1 - x.From the above formulae for x and y then any omissions can be completed.EXAMPLE : complete the ordered pairs (1) (7, y) and (2) (x, -4)(1) y = 1 - x = 1 - 7 = -6 : The ordered pair is thus (7, -6)(2) x = 1 - y = 1 -(-4) = 5 : The ordered pair is thus (5, -4)
It works out that x = 6 and y = 3 or as (6, 3)
False
(0, 6)
The ordered pair is (1, 3).
The ordered pair is (1, 1).
(5,7)
(5,3)
No real roots.
The ordered pair is (5, 4).
The ordered pair is (-1, -2).
The ordered pair is (-1, -7).
There are an infinite number of ordered pairs. (-5, -7) is one pair
k
{-4,-5}