SOLUTION: a rectangle's length is y cm. Its width is 5 cm. Its perimeter is 34 cm. Find the length of the rectangle

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: a rectangle's length is y cm. Its width is 5 cm. Its perimeter is 34 cm. Find the length of the rectangle      Log On


   

Question 252483: a rectangle's length is y cm. Its width is 5 cm. Its perimeter is 34 cm. Find the length of the rectangle
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
You probably started out with a picture and labeling length Y and width 5; always a good first step to understanding the problem.
The perimeter formula is
P+=+2L+%2B+2W
we know length is Y and width is 5, so we put in Y and 5 to get
P+=+2Y+%2B+2%285%29
Now the perimeter is given to us as 34, so,
34+=+2Y+%2B+10
Solve for Y to get
24+=+2Y
12 = Y.
The length of the rectangle is 12 cm.