anonymous
  • anonymous
Solve the system, using substitution. 4x + y = 4 and y = 4 - 4x A. no solution B. infinitely many solutions I put A is this correct?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
YES
anonymous
  • anonymous
No, that is incorrect. The answer is B.
anonymous
  • anonymous
Im getting mixed signals...

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More answers

anonymous
  • anonymous
there are infinite solutions
anonymous
  • anonymous
lol. since 4=4 i don't think there is infinite solutions
anonymous
  • anonymous
$$(x,y) = (1, 0)$$ is an answer.
anonymous
  • anonymous
as is $$(x,y)=(1/2, 2)$$.
anonymous
  • anonymous
nomothetis how did you get this ?
anonymous
  • anonymous
I am getting a little MORE confused... ^_^ lol so many diff answers!!
anonymous
  • anonymous
just try some (x,y) = (0.5, 2) is another solution
anonymous
  • anonymous
:P sorry i am retaking stuff from like the beginning of the year :P So then do u all agree with jimmy?
anonymous
  • anonymous
Here's how you prove that you have an infinite number of solutions: Can you make get equation 2 by multiplying equation 1 by something? Let's consider it: $$4x + y = 4$$ This is the same thing as: $$y = 4 - 4x$$ Since all we need to do is pass the x to the other side. So the two equations are really the same equation. So any points that is a solution for the first equation will work for the second equation. But if you look at the first equation, you see that it's the equation for a line. Therefore, any point on that line will be a solution to the second equation as well. This means that you have an infinite number of solutions.
anonymous
  • anonymous
oh nomo siad that one try (x,y) = (0.25,3) then!!!
anonymous
  • anonymous
Ok so its B?!?!?! are we positive on this answer now? lol
anonymous
  • anonymous
i don't agree since it clearly states that "solve by substitution"
watchmath
  • watchmath
B) is correct, even if you use substitution. The substitution gives 4=4 which means that the statement is always true for any (x,y) as long as (x,y) is on the line 4x+y=4.
anonymous
  • anonymous
right nomo - the 2 equations are the same and u can fit infinite values of x and corresponding values of y into the equation
anonymous
  • anonymous
ok i see. that makes sense watchmath
anonymous
  • anonymous
absolutely positively b !! lol
anonymous
  • anonymous
Okay!! haha finally!! (: lol

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