Identify the y-intercept and interpret its meaning in the context of the graph

Put the following steps for calculating net worth in the correct order

The perimeter of △cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.

Angle sum theorem. find z,x,y and w