Tell which number is greater. 0.9 or 95%​

What is the reflection image of (5,-3) across the line y = -x?

In a column proof the right column states your reasons

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.