Find the value of n. 19n-57=76

Volume of cylinder with a radius of 8cm and height of 25 cm

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

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827