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I'm giving 40 points for this!! Pleaseeee help ASAP :)
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I'm giving 40 points for this!! Pleaseeee help ASAP :)

I'm giving 40 points for this!! Pleaseeee help ASAP :)-example-1
User Harry Wang
by
8.9k points

1 Answer

2 votes

Answer:

  • 7 m

Explanation:

Let the width is w and the length is w + 5.

The area is 84:

  • w(w + 5) = 84
  • w² + 5w - 84 = 0
  • w² + 12w - 7 w - 84 = 0
  • w(w + 12) - 7(w + 12) = 0
  • (w - 7)(w + 12) = 0
  • w = 7 is the only positive root

User Anther
by
8.1k points
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