Two airliners are 1600 miles apart and heading towards eachother at different altitudes. the first plane is traveling north at 620 miles per hour, while the second is traveling south at 780 miles per hour. when will the planes pass each other

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

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?

Which of the following is the explicit rule for a geometric sequence defined a recursive formula of a -5a for which the first term is 23?