azarco7879
azarco7879 azarco7879
  • 02-01-2018
  • Mathematics
contestada

Choose the correct ordered pair

Choose the correct ordered pair class=

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hkonate00
hkonate00 hkonate00
  • 02-01-2018
your answer will be A. (8,1)
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sbcardinals
sbcardinals sbcardinals
  • 02-01-2018
A (8, 1) is your answer. 

x + y = 9
x - y = 7

We have to use a system of equations to solve for both x and y

Take equation 1 (x + y = 9)
Solve for x by subtracting y from both sides
x = 9 - y

Plug 9 - y in for x in the second equation.
(9 - y) - y = 7

Solve for y
9 - 2y = 7
2 = 2y
y = 1

Now that we know y = 1, we can plug 1 in for y in the first equation to solve for x.
x + 1 = 9

Solve for x
x = 8

So our coordinate that satisfies the system of equations is (8, 1)
Answer Link

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