The width of a rectangle measures (3n + 8p) centimeters, and its length measures (3n – 4p) centimeters. Which expression represents the perimeter, in centimeters,
of the rectangle?

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,

21/2 hours=150 minutes150 minutes x 80 beats per minute= 12,000 beats in 2 1/2 hours