Kenneth S. answered 08/07/17
Tutor
4.8
(62)
Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
You need to make a drawing (rectangle). Label width w. Label length 5+2w.
PERIMETER (note spelling) is two times the sum of its four sides. Write that algebraically, and collect like terms, setting it equal to 70. Solve for w. Then compute length.
In an Algebra class, you need to tackle problems like this with courage in a similar way. Learn this!