Choose a quantity to be represented by a variable, then write a mathematical expression for each. Do not solve.

Ass . The Nature of Mathematics Practice Set 2 - Mathematical Language and Symbols 9. The perimeter of a rectangle whose length is twice the width 10. The sum of three consecutive even integers 11. A three-digit number whose hundreds digit is twice the tens digit and the tens digit is 3 more that the units digit. 12. The total peso value of 20 coins consisting of P5-coins and P10-coins 13. The total distance travelled by a boat 30 minutes upstream and 25 minutes downstream in which then rate of the current is 2 kph 14. The fraction of work done by a man who can finish a job in 3 hours and 20 minutes 5. The percentage of alcohol in a mixture formed by combining 1 liter of pure water and x liters of 40% alcohol solution