John wants to buy a shirt that is $18.22. He can use a 15% off coupon or a coupon to save $10. Which coupon should he use to save more money?

15 percent off

Step-by-step explanation:

15 percent of 18.22 is 2.73 and 18.22 - 10 is 8.22

i can you, i love poetry

geometry: triangles

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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+

25.45584