An airplane is flying from New York City to Los Angeles. The distance it travels in miles, $$ , is related to the time in seconds, $$, by the equation $$. How fast is it flying (in miles per second)? This is your unit rate or constant of proportionality.

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,