Paige A.
asked • 04/15/19
Sam Z. answered • 04/20/19
Math/Science Tutor
rectangle=x(x+8). border=(x+4)(x+12)-x(x+8).
(x^2+16x+48)-(x^2+8x)=341
x^2 cancels
16x-8x=8x so 8x+48=341
8x=293
x=36.625
rectangle= 36.625*44.625=1634.39sq/in
border=40.625*48.625=1975.39-1634.39=341sq/in (see formulas above)
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Sam Z.
I forgot to add 8 instead of 4 border is to be (x+8)(x+16)-x(x+8) (x^2+24x+128)-(x^2+8x)=341 x^2 cancels 24x-8x=16x so 16x+128=341 16x=213 x=13.31 rectangle=13.31*(13.31+8)=283.72sq/in border=(13.31+8)(13.31+16)-283.72=34104/20/19