anonymous
  • anonymous
The length of a rectangle is twice the width. The area is 648yd^2. Find the length and the width.
Mathematics
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anonymous
  • anonymous
The length of a rectangle is twice the width. The area is 648yd^2. Find the length and the width.
Mathematics
katieb
  • katieb
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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darthsid
  • darthsid
Do you know how to calculate the area of a rectangle? What's the formula for it?
anonymous
  • anonymous
A=l times w. I set it up this way. Let the length = 2w and the width = w, so with area being 648, the equation is 648=2w(w) correct?
darthsid
  • darthsid
That's exactly right, nice work!

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anonymous
  • anonymous
Ok, then after I come up with 648=2w^2, I get lost!! Do I square both sides?
darthsid
  • darthsid
No, you first divide both sides by two to get 324=w^2
darthsid
  • darthsid
Now, to find w, you have to take the square root of both sides
anonymous
  • anonymous
Ok, then I square both sides?
darthsid
  • darthsid
ok let me explain a little: Squaring sides means raising it to the power of two (multiplying by itself twice) so, square of w is w^2 Square root means the reverse of the above. So you need to take the square root of the sides
anonymous
  • anonymous
Ok, so it would be the square root of 324=w
darthsid
  • darthsid
Exactly!

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