In the figure below, there are three right trangles. Complete the following.

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

Which of the following is the true for f(x) = 5cos