pinklion23
  • pinklion23
Which of the ordered pairs in the form (x, y) is a solution of this equation? https://static.k12.com/bank_packages/files/media/mathml_64c9ba5aa2aeeeced75887bdf6c858db5c69d76f_1.gif A.The first is not a solution, but the second is. B.Both are solutions. C.Neither is a solution. D.The first is a solution, but the second is not.
Mathematics
schrodinger
  • schrodinger
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pinklion23
  • pinklion23
pinklion23
  • pinklion23
dakid88
  • dakid88

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Nnesha
  • Nnesha
substitute x and y for each pair then solve if you get equal sides then order pair is a solution
Nnesha
  • Nnesha
\[\huge\rm 5x-\frac{ y }{ 3 }=13\] substitute (x,y) for (2,-9) replace x with 2 and y with -9
triciaal
  • triciaal
as above. if the substitution (x,y) makes the equation true then (x,y) is a solution.
pinklion23
  • pinklion23
\[10-\frac{ -2 }{ 3}=13\]
triciaal
  • triciaal
y = -9
Nnesha
  • Nnesha
y= -9 (2,-9)
pinklion23
  • pinklion23
ok so then the answer is D?
Nnesha
  • Nnesha
did you try 2nd one ?
pinklion23
  • pinklion23
oh right i have to do that on lol :)
Nnesha
  • Nnesha
yes substitute (x,y) for (3,-6)
pinklion23
  • pinklion23
\[15-\frac{ -6 }{ 3 }=13\]
pinklion23
  • pinklion23
right?
Nnesha
  • Nnesha
looks good what did you get at left side ?
pinklion23
  • pinklion23
um well -6/3=-2 so then 15+2does not equal 13 right
Nnesha
  • Nnesha
perfect!
pinklion23
  • pinklion23
yea can you help me with one or two more please x)
Nnesha
  • Nnesha
i'll try
pinklion23
  • pinklion23
Which pair are solutions to the equation? 4xy + 8 = 36 A.(1, 7) and (4, 9) B.(7, 1) and (3, 2) C.(1, 7) and (7, 1) D.(4, 9) and (3, 2)
pinklion23
  • pinklion23
Nnesha
  • Nnesha
same steps
pinklion23
  • pinklion23
so A is wrong
pinklion23
  • pinklion23
B is wrong
pinklion23
  • pinklion23
c is right and D is wrong so C is the answer
Nnesha
  • Nnesha
why do you think C is correct ?? :=)
pinklion23
  • pinklion23
because 4*1*7=28+1=36 and 4*7*1+8=36 too
Nnesha
  • Nnesha
good work!
pinklion23
  • pinklion23
thx one more pls this one is harder
pinklion23
  • pinklion23
Which ordered pairs in the form (x, y) are solutions to the equation (x + 6)y = 9? Choose all answers that are correct. A.(−5, 9) B.(−3, 3) C.(3, 1) D.(7, 9)
pinklion23
  • pinklion23
oh um brb bathroom break sorry
Nnesha
  • Nnesha
same steps
pinklion23
  • pinklion23
im back and you changed you pic :)
Nnesha
  • Nnesha
yee :P
pinklion23
  • pinklion23
so A is right
pinklion23
  • pinklion23
b is right
pinklion23
  • pinklion23
c is right
pinklion23
  • pinklion23
and D is wrong
pinklion23
  • pinklion23
am i right?
Nnesha
  • Nnesha
ye you got it!
pinklion23
  • pinklion23
thx so much that is it your awesome :)
Nnesha
  • Nnesha
np&thanks

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