Julio is paid 1.2 times he is a normal hourly rate for each hour he works over 28 hours in a week last week he worked 36 hours and earned 432.40 cents

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.