gigi1103
  • gigi1103
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Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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gigi1103
  • gigi1103
What is the combined perimeter of these two rectangles? A) 6x + 14 B) 12x + 24 C) 12x + 26 D) 24x + 52
gigi1103
  • gigi1103
@heyyitspaige can you help on this one?
gigi1103
  • gigi1103
@salemlover352

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gigi1103
  • gigi1103
@563blackghost
gigi1103
  • gigi1103
can you help?
563blackghost
  • 563blackghost
Yea I was just trying to understand what we gotta do ^^
gigi1103
  • gigi1103
lol k
563blackghost
  • 563blackghost
OK since its a rectangle that means the oppisite of the known part of the rectangle is the same.... so |dw:1450283188508:dw|
563blackghost
  • 563blackghost
So the equation would be \[((2x+7)+(4x+5))\times2\]
563blackghost
  • 563blackghost
This is for the first rectangle...
gigi1103
  • gigi1103
k
563blackghost
  • 563blackghost
So we first combine like terms.... so we add 2x + 4x and 7 +5....so what is the simplified equation?
gigi1103
  • gigi1103
6x +11?
563blackghost
  • 563blackghost
Close its 6x+12 ^^ Now we must multiply by 2 to it....\[(6x+12)\times2\] so we multiply 6x by 2 or 6x + 6x and we multiply 12 by 2 or 12 + 12....
gigi1103
  • gigi1103
whaaaaa im lost now?
gigi1103
  • gigi1103
oh wait i get it
563blackghost
  • 563blackghost
ok good ^^
563blackghost
  • 563blackghost
sorry my internet is bad right now...
563blackghost
  • 563blackghost
So you figured it out?
563blackghost
  • 563blackghost
@gigi1103
gigi1103
  • gigi1103
yas its b right?
563blackghost
  • 563blackghost
Incorrect...we want to know the "combined" peremeters which is of the two triangles so we only know of one and we need to know the other one and then we will add those two up....
gigi1103
  • gigi1103
ohhhhhh
563blackghost
  • 563blackghost
^^ to be honest I thought that too but i saw that it said "combined" and I had the exact response xD
gigi1103
  • gigi1103
lol
563blackghost
  • 563blackghost
So do you still need help or you can do the other part?
gigi1103
  • gigi1103
can you help me on the last part?
563blackghost
  • 563blackghost
Sure ^^ now we know of the perimeter of the first rectangle which is 12x +24 now we need to know the other one.... so like said we will add both of the equations and then multiply that by 2...\[((3x+14)+(3x))\times2\]
563blackghost
  • 563blackghost
So we first combine like terms so 3x + 3x and 14 will left alone since it does not have any other terms like it.... \[?x+14\]
gigi1103
  • gigi1103
6x +14?
563blackghost
  • 563blackghost
Correct ^^....now we need to multiply 6x+14 by 2....\[(6x+14)\times2\] so we multiply 6x by 2 or 6x+6x and we multiply 14 x 2 or 14+14...
gigi1103
  • gigi1103
so 12x and 28
563blackghost
  • 563blackghost
Correct again ^^....so we now we know of the total perimeters of both rectangles so now we need to add both of these....\[(12x+24)+(12x+28)\] So we first combine like terms so 12x +12x and 24+28....
gigi1103
  • gigi1103
so 38 +40
563blackghost
  • 563blackghost
Incorrect....try again ^^
gigi1103
  • gigi1103
24x qnd 52?
563blackghost
  • 563blackghost
Correct! The equation of the combine rectangles is \[24x+52\] Great Job! ^^
gigi1103
  • gigi1103
thanks!!!
563blackghost
  • 563blackghost
Np ^^ Im glad I was helpful....if you ever need help in the future and see me on just tag me in your question xD (i think I have told you this before xD)
gigi1103
  • gigi1103
lol kk XD
563blackghost
  • 563blackghost
well byeee ^^

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