I think of a number. When I add 12 and subtract 8, I get
15. What is that number?

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

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?

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.