Help wanted, please. Alfonso and Gracie have decided to join a gym! Gracie found a gym that costs $20 to join and charges $4 per class. Alfonso found a gym that costs $34 to join but only $2 per class. a. Write a system of equations modeling the Gyms’ charges.

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.