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In-s [12.5K]
4 years ago
5

Can someone help me how to do it​

Mathematics
1 answer:
Sergeeva-Olga [200]4 years ago
8 0
  • let the rectangular figure be ABCD and the diagonal is AC which is 10m
  • therefore in the right angled triangle ABC (X)^2+(2X-4)^2=(10)^2 "Pythagorean theorem"
  • X^2+(4X^2-16X+16)=100
  • 5X^2-16X+16=100
  • 5X^2-16X-84=0
  • X=6 or X=-2.8"refused as the length can't be negative"
  • length =6 and the width=8
  • perimeter=(6+8)x2=28 length unit

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The answer is:
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n = ¼ ; or, write as: 
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Explanation:
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-7 / (2n) = 49 ;
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-49 * (2n) = -7 ; 
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Divide each side by "(-49)" ; to isolate the "2n" on one side, and to get rid of the "negative" values:
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[-49*(2n)] / -49 = -7/ -49 ;   to get:
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2n = (½);  Now, divide EACH side of the equation by "2"; to isolation "n" on                       one side of the equation, and to solve for: "n";
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3 years ago
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