qtdouglas14 qtdouglas14
  • 10-04-2018
  • Mathematics
contestada

a rectangle length is 8cm more than three times its width. it the perimeter is 128cm find the length

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sid071
sid071 sid071
  • 10-04-2018
hey!!

here is your answer >>>

width is x

length is 3x + 8

perimeter = 128

2(x + 3x +8) = 128

2( 4x + 8) = 128

4x + 8 = 64

4x = 56

x = 14!.

width = 14

length is 50

if helped! brainliest
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hsioaweichu
hsioaweichu hsioaweichu
  • 10-04-2018
128 - 16= 112 
The length is equal to 3 widths. So there will be 8 widths total.
112 ÷ 8 = 14 
14 • 3 = 42
42+8 = 50
50+50+14+14=128
So the lenghth of the rectangle is 50cm.
Answer Link

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