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Katlyn99
Group Title
Which ordered pairs from the replacement set are solutions to the equation?
y = 2x + 9 ; Replacement Set {((1, 11), (0, 8), (1, 7), (2, 5)}
(1, 11)
(0, 8)
(1, 7)
(2, 5)
 one year ago
 one year ago
Katlyn99 Group Title
Which ordered pairs from the replacement set are solutions to the equation? y = 2x + 9 ; Replacement Set {((1, 11), (0, 8), (1, 7), (2, 5)} (1, 11) (0, 8) (1, 7) (2, 5)
 one year ago
 one year ago

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tcarroll010 Group TitleBest ResponseYou've already chosen the best response.1
Each ordered pair is of the form:\[(x _{1}, y _{1})\]You take each ordered pair and substitute like so:\[y _{1} = 2x _{1} + 9\]and see if it is true. You do this for each ordered pair, one at a time and test it. For your first ordered pair, the x1 = 1 and the y1 = 11. So, you can test the first one by substituting those values.
 one year ago

tcarroll010 Group TitleBest ResponseYou've already chosen the best response.1
So you ask yourself if: 11 = 2(1) + 9 is true or not.
 one year ago

tcarroll010 Group TitleBest ResponseYou've already chosen the best response.1
What is 2(1) ? Hint: that is 2 times 1
 one year ago

Katlyn99 Group TitleBest ResponseYou've already chosen the best response.0
so 1,11 works
 one year ago

tcarroll010 Group TitleBest ResponseYou've already chosen the best response.1
To perform multiplication with negative signs, you first multiply the numbers and then if the number of "" signs is an even number, you have a positive result. Just saw your answer, so you probably already understand this. Good. So, continuing: 11 = 2(1) + 9 > 11 = 2 + 9 Yes, you already saw now that it works. Good job. Now just check the other 3 ordered pairs. Hint: only one doesn't work.
 one year ago

Katlyn99 Group TitleBest ResponseYou've already chosen the best response.0
ok thanks:)
 one year ago

tcarroll010 Group TitleBest ResponseYou've already chosen the best response.1
So, this is making sense to you now?
 one year ago

Katlyn99 Group TitleBest ResponseYou've already chosen the best response.0
yes it is I just needed a refresher
 one year ago

tcarroll010 Group TitleBest ResponseYou've already chosen the best response.1
I'm glad you're getting this. It's a great feeling when understanding comes. It's like a gift.
 one year ago

tcarroll010 Group TitleBest ResponseYou've already chosen the best response.1
Good luck again and thx for the recognition!
 one year ago
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