Find the number of ways in which a student can choose 5cource out of 9 course?

Abiologist is recording the loss of fish in a pond. he notes the number of fish, f, in the pond on june 1. on july 1 there were 63 fish in the pond, which is 52 fewer fish than were in the pond on june 1. which equation represents this situation? a. f – 52 = 63 b. f – 63 = 52 c. 63 – f = 52 d. f – 63 = –52

Answer question above and explain each step : )

What is not true about kl and mn? what is mn? (show your work)