Please help I am confued

50

40

You have them right

Step-by-step explanation:

If he is charging 40 per hour, take away 40 from 90 because this is the first hour. Meaning at hour 0, there are 50 dollars.

good luck on your studies! : )

david edward.

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