There are some 1-dollar bills, some 5-dollar bills, and a 20-dollar bill in an envelope. The number of 1- dollar bills is three times the number of the 5-dollar bills. We randomly pull a bill from the envelope. How
many 1-dollar bills are in this envelope if the expected value of the bill pulled is $2.72?
The number of 1-dollar bills is

Apool measures 12.3 feet by 16.6 feet. if the longer wall of the pool has a diagonal of 17.8 feet, what is the volume of the pool? (round to nearest tenth)

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field