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Nick2019
Group Title
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
 2 years ago
 2 years ago
Nick2019 Group Title
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
 2 years ago
 2 years ago

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rebeccaskell94 Group TitleBest ResponseYou've already chosen the best response.0
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 Righto?
 2 years ago

rebeccaskell94 Group TitleBest ResponseYou've already chosen the best response.0
So far at least haha obviously not the full answer yet but I want to make sure I'm on the right track.
 2 years ago

Nick2019 Group TitleBest ResponseYou've already chosen the best response.1
umm i really dont know but if you get the wrong answer no big deal :)
 2 years ago

rebeccaskell94 Group TitleBest ResponseYou've already chosen the best response.0
lol no problem xD
 2 years ago

SmoothMath Group TitleBest ResponseYou've already chosen the best response.2
Mmm, I don't quite see what you're saying there. I don't think it's right.
 2 years ago

Nick2019 Group TitleBest ResponseYou've already chosen the best response.1
what did you get?
 2 years ago

rebeccaskell94 Group TitleBest ResponseYou've already chosen the best response.0
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
 2 years ago

SmoothMath Group TitleBest ResponseYou've already chosen the best response.2
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?
 2 years ago

SmoothMath Group TitleBest ResponseYou've already chosen the best response.2
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.
 2 years ago

Nick2019 Group TitleBest ResponseYou've already chosen the best response.1
ok thanks for the help
 2 years ago

SmoothMath Group TitleBest ResponseYou've already chosen the best response.2
Haha don't leave yet. Tell me what you get for how long L is.
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.0
i think what @rebeccaskell94 did is a variation of the perimeter...looks like combo of perimeter and area
 2 years ago

rebeccaskell94 Group TitleBest ResponseYou've already chosen the best response.0
oh pffft my bad. I need to stop helping people in math xD
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.0
lol dont get discouraged!!
 2 years ago

SmoothMath Group TitleBest ResponseYou've already chosen the best response.2
Becca, the best way to learn something is to teach it. Just try to make sure you understand it before you teach =)
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.0
like einstein said...if you cant explain it simply then you dont understand it fully
 2 years ago

SmoothMath Group TitleBest ResponseYou've already chosen the best response.2
Great quote =) I try to let it inform my teaching style.
 2 years ago
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