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BioHazard9064
 one year ago
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BioHazard9064
 one year ago
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BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0Choose the equivalent system of linear equations that will produce the same solution as the one given below. 4x  y = 11 2x + 3y = 5 A. 4x  9y = 19 10y = 30 B. 4x + 3y = 5 2y = 6 C.7x  3y = 11 9x = 6 D.12x  3y = 33 14x = 28

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So then solve the first one and write down the results you get from it. Then solve the other ones until you get the same answers. Do you know how to solve systems of linear equations at all?

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0Just started the unit

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Here is a website to get started with them: http://www.purplemath.com/modules/systlin1.htm After you read a little and get a better understanding of them, I'll help you go through this problem.

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0ok i still don't fully understand

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0is the answer B? because thats what I got before I just want to be sure cuz i have not done this in forever

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Well then let's go over the example in your question together. \[\bf 4x  y = 11 \\2x + 3y = 5\] In my opinion, the substitution method is my favorite so let's use that one first. When we use substitution, we want to get rid of either the x or y value. We do this by making those values equal to each other. In this example, I would probably choose to get rid of the x value by multiplying the bottom half by 2. \[\bf 4x  y = 11 \\2(2x + 3y = 5)\]\[\bf 4x  y = 11 \\4x + 6y = 10\] Now we are going to subtract the bottom line from the top \[\bf ~~4x  y = 11 \\(4x + 6y = 10)\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So what would we get from there?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Seperate the three different values. So \[\bf 4x4x=?\\~and~\\y6y=?\\~and~\\1110=?\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Can you solve those three things I have there? What is 4x4x?

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0or does the x cancel out

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0No, it would be 0. The x's cancel out.

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0and yy6 would be y or would it cancel out aswell

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0y6y is the same as 16.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Correct. And 1110 would be?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0That would be if it was 11+10. 1110=21

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So what we have left is \[\bf 7y=21\] Now solve for y

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Correct. So now substitute \[\bf y=3\] into the top section of the problem and solve for x

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The "top section" would be \[\bf 4x  y = 11\] by the way

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0given what you showed me me so far it would be B. 4x + 3y = 5 2y = 6 am i right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Let's please finish solving the example

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0So then we would solve the bottom part 2x + 3y = 5

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0What? Solve for x in \[\bf 4x3=11\]

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0Idk how to solve for the x in this part

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\bf 3x=9\] Can you solve for x here?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How about this one? \[\bf 3x3=9\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How about this one \[\bf 4x3=11\] Solve it the same way as that last one.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Correct. So now we have solved the example \[\bf x=2\\y=3\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I suppose you could just plug those values into the options and see which ones work.

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0indeed and the only one that has that Is B

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Are you sure? B doesn't check out with me.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\bf 2(3) \neq 6\]

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0Oh i looked at b but saw the numbers different

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0Then would It Be C

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0sorry im really tired so sorry if im not 100% in to it

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0I dont know really

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Let's go over A \[\bf x=2\\y=3\\~\\4x  9y = 19\] Plug em in and see if they work

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i don't know how to say this, but it does work.

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0all I had to do was do 827

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\bf x=2\\y=3\\~\\10y=30\] Does it work?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So then A is all good. Now let's check D.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\bf x=2\\y=3\\~\\12x  3y = 33\]

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0i believe that D wouldn't work

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0What reason supports that belief?

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0Its really an educated guess

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0What is the "educated" in that educated guess?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So it's just a guess then

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Here's a protip for turning your guesses into certainty: \[\huge Do\\\huge the\\\huge work\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\bf x=2\\y=3\\~\\12x  3y = 33\]

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0ok sorry im told I got to get off but I think its A am i right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Well D is right too but yes, A is correct

BioHazard9064
 one year ago
Best ResponseYou've already chosen the best response.0have a good night
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