In Δ LMN, m ∠ L = 100°, m ∠ M = 25°, and l= 13. What is m? *
A) about 75
B) about 5.49
C) about 5.58
D) about .43

How do i put 3(x+7) in distributive property

Solve 13 + w/7= -18 (w/7 is a fraction)

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.