Sierra was given the following expression to solve. 30 + 20 + (32 − 4) x 2

She incorrectly wrote 32 as her answer.
Which statement best describes her mistake?

8

step-by-step explanation:

answer

106 emergencies

step-by-step explanation:

she drove 134 miles

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