Finding the Width of a Professional Football Field
How Wide is a Professional Football Field?

Problem: The rectangular playing area of a professional football field is 100 yards long. The perimeter of the playing area is 920 feet. The formula for the perimeter of a rectangle is [P equals two times l plus two times w] .
How many feet wide is the playing area? Don't forget to convert the length from yards to feet. (There are 3 feet in 1 yard.)

Solution: There are two ways to solve this problem.
You can solve the formula for the unknown variable, then substitute. Or, you can subst

Question

Finding the Width of a Professional Football Field 		
  How Wide is a Professional Football Field?

Problem: The rectangular playing area of a professional football field is 100 yards long. The perimeter of the playing area is 920 feet. The formula for the perimeter of a rectangle is [P equals two times l plus two times w] .
How many feet wide is the playing area? Don't forget to convert the length from yards to feet. (There are 3 feet in 1 yard.)

Solution: There are two ways to solve this problem.
You can solve the formula for the unknown variable, then substitute. Or, you can subst