The ordered pair 5 , 1 satisfies which of the following equations:

Question

my answers can either be :

1. 2x-2y= 5
2. 2x-y = 2
3. 2x+2y=11
4. 2x+3y=13

Answer 1

First off, 5, 1 is not an ordered pair. (5,1) is an ordered pair. The way we notate things is important in math!

We know that an ordered pair is (x,y), so we replace x with 5 and y with 1 in this case.

2(5) - 2(1) = 5

10 - 2 = 5

8 = 5

3 = 0

Well, that's not true, right? So, it's not this equation. I bet you can find the answer!

Answer 2

Ordered pair (5,1)

mean x=5 and y=1

2x-2y = 8 not 5 eliminate

2x-y = 9 not 2 eliminate

2x+2y = 12 not 11 eliminate

2x+3y = 13 This one is correct