Think About the Process a jar contains only pennies, nickels, dimes, and quarters. There are 20 pennies, 23 dimes, and 24 quarters. The rest of the coins are nickels. There are 81 coins in all.
How many of the coins are not nickels? If n represents the number of nickels in the jar, what
equation could you use to find n?
Yes

geometry: triangles

solvers

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+

25.45584

47.28 or 47.2857143

step-by-step explanation:

you just divide 331 by 7 and you get that answer. ( i think so tho)