Tammy bought 11 pounds of flour for $5. how many pounds of flour did she get per dollar?

How do you use the elimination method for this question? explain, because i really want to understand!

Which of these triangle pairs can be mapped to each other using two reflections?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?