Fjessie is 24 years younger than her mother and if the sum of their ages is 84, how old is jessie?

Ineed to learn how to solve this problem

Arectangular exercise mat has a perimeter of 36 feet the length of the mat is twich the width writeand solve an equation to determine the length in feet. of the mat then find the area in square feet of the mart

Place the following steps in order to complete the square and solve the quadratic equation,