3n+2(−2n−1)

simplify to create an equivalent expression

choose 1 answer

a. -n + 2
b. n + 2
c. -n - 2
d. n - 2

C. -n - 2

Step-by-step explanation:

Given expression is

Now we need to simplify   to create an equivalent expression then match with correct choice from the given choices:

A. -n + 2

B. n + 2

C. -n - 2

D. n - 2

Hence correct choice is C. -n - 2

1,645,493,059.35

step-by-step explanation:

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