anonymous
  • anonymous
Sarah wants to hang a mirror in her room but the mirror and frame must not have an area larger than 15 square feet. The mirror is 3 feet wide and 4 feet long. Which quadratic equation represents the area of the mirror and frame combined? (The frame must have equal width of x on each side.) 3x2 + 14x − 2 = 0 4x2 + 14x − 3 = 0 x2 + 12x − 14 = 0 2x2 + 7x − 14 = 0
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
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anonymous
  • anonymous
Well to find the area of a rectangle we do S + S x 2 or s•s + s•s so we have 3 +4 x 2 = x or 3 x 3 + 4 x 4 = x @lgbasallote Right-o?
anonymous
  • anonymous
So far at least haha obviously not the full answer yet but I want to make sure I'm on the right track.

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anonymous
  • anonymous
umm i really dont know but if you get the wrong answer no big deal :)
anonymous
  • anonymous
lol no problem xD
anonymous
  • anonymous
Mmm, I don't quite see what you're saying there. I don't think it's right.
anonymous
  • anonymous
what did you get?
anonymous
  • anonymous
Well we have to find the initial area before doing the next part xD lol idk @nick SmoothMath is a dollface he's really good at helping :D I'll shut up now :x
anonymous
  • anonymous
That's a thought, Becca, but this will work better. First, Nick, simply draw a picture, like this |dw:1341586226088:dw| See how I drew the mirror, 3X4, and then the frame around it has a width of x?
anonymous
  • anonymous
yep
anonymous
  • anonymous
To find the area, we need to do L*W, but first, we should write an expression for how long L is and another for how long W is. See if you can do that on your own.
anonymous
  • anonymous
ok thanks for the help
anonymous
  • anonymous
Haha don't leave yet. Tell me what you get for how long L is.
lgbasallote
  • lgbasallote
i think what @rebeccaskell94 did is a variation of the perimeter...looks like combo of perimeter and area
anonymous
  • anonymous
oh pffft my bad. I need to stop helping people in math xD
lgbasallote
  • lgbasallote
lol dont get discouraged!!
anonymous
  • anonymous
Becca, the best way to learn something is to teach it. Just try to make sure you understand it before you teach =)
lgbasallote
  • lgbasallote
like einstein said...if you cant explain it simply then you dont understand it fully
anonymous
  • anonymous
Great quote =) I try to let it inform my teaching style.

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