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Mathematics 19 Online
OpenStudy (anonymous):

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)} I'll give a medal to anyone with the best answer :)

OpenStudy (anonymous):

the first one

OpenStudy (anonymous):

It can be more than one answer by the way.

OpenStudy (anonymous):

yeah im trying to do it in my head

OpenStudy (eyust707):

the third one and forth one also work too. ill give you a medal if you learn why =)

OpenStudy (eyust707):

wanna know how i got that?

OpenStudy (anonymous):

Why? Lol.

OpenStudy (eyust707):

ok so in m ath we use this notation we we state the x number then the y number (x,y) like that.. so which each one it first says the the x number then it says the y number. figure out if it is a solution all we have to do it put the number in for the letters

OpenStudy (eyust707):

so in the first one we have (-1, 11) this means that x = -1 and y = 11

OpenStudy (eyust707):

all you have to do is put the -1 in for x and the 11 in for y, then check your answer

OpenStudy (eyust707):

if it works it is a solution

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