Is x = 4 part of the solution to the inequality: 3x - 7 < 12

Group of answer choices

No because 19 is greater than 12

Yes because 5 is less than 12

Yes because 4 is less than 12

No because 0 is greater than 12

tube or goog would be a great resource to with that question

geometry: triangles

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lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

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