Which of the folowing are monomials? A. 99
B. 11x-y
c. x+9
d. 20x^11
e. 11^2-9
f. x^9

21 i watched a 3 hr vid explaining it

step-by-step explanation:

du what else would it be

brainliest

geometry: triangles

solvers

lessons

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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

its a trick question

step-by-step explanation:

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