1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1 --1-1-1--1-1-1--1-1-1--1-1-1-1-1--1 -1-1-1- = ? Don't use a calculator

What is the common denominator for 3/5+3/4

Janet is mixing a 15% glucose solution with a 35% glucose solution. this mixture produces 35 liters of a 19% glucose solution. how many liters of the 15% solution is januet using in the mixture? a. 25 liters c. 28 liters b. 7 liters d. 10 liters

At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%