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Nick2019
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
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?
So far at least haha obviously not the full answer yet but I want to make sure I'm on the right track.
umm i really dont know but if you get the wrong answer no big deal :)
lol no problem xD
Mmm, I don't quite see what you're saying there. I don't think it's right.
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
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?
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.
ok thanks for the help
Haha don't leave yet. Tell me what you get for how long L is.
i think what @rebeccaskell94 did is a variation of the perimeter...looks like combo of perimeter and area
oh pffft my bad. I need to stop helping people in math xD
lol dont get discouraged!!
Becca, the best way to learn something is to teach it. Just try to make sure you understand it before you teach =)
like einstein said...if you cant explain it simply then you dont understand it fully
Great quote =) I try to let it inform my teaching style.