Math
posted by Unknown .
The variable W represents the width of a rectangle. The length of the rectangle, L, is 5 less than twice the width.
Write an expression for the length of the rectangle in terms of W.
Write a simplified expression for the perimeter of the rectangle in terms of W.
Find the perimeter of the rectangle if the width is 3 inches.

Math 
John
Well W = 3
L = (2W)5 = (6)  5 = 1
so
W + W + L + L = perimeter
so 2W + 2L = perimeter
so subbing 2W5 in for L we get
2W + 2(2W5) = perimeter
= 2W + 4W10 = perimeter
= 6W  10 = perimeter
= 6(3)  10 = perimeter
=18  10 = perimeter
= 8 = perimeter
or solving the other way L = 1 W = 3
2W + 2L = 6 + 2 = 8 = perimeter
Respond to this Question
Similar Questions

math
the length of a rectangle is 5 ft more than twice the width. a)if x represents the width of the rctangle, represent the perimeter of the rectangle in terms of x. b) if the perimeter if the rectangle is 2 ft more than eight times the … 
maths
the length of a rectangle is 3 less than 5 times its width. Write a simpified algebriac expression for the perimeter of a rectangle. If the rectangle width is tripled and its length is doubled,the perimeter of new rectangle is 92cm … 
9th grade polynomials
How do you write the expression for the area of the rectangle If the length of a rectangle is two more than three times it's width,then write an expression for area of the rectangle Find the perimeter of the rectangle in problem 1. 
geometry
If the length of a rectangle is twice its width, w, write an expression to represent the perimeter of the rectangle. If the perimeter of the rectangle is 72 inches, what is the length and width of the rectangle? 
algebra
The length of a rectangle is 5 inches longer than its width. Its perimeter is 45 inches. Let w equal the width of the rectangle. Write an expression for the length in terms of the width. Use expressions for the length and width to … 
Math
A rectangle is inscribed in a semi circle of radius 2, let x represent half the length of the rectangle. Write an expression for the area of the rectangle in terms of x. Well I know area=length X width. That's about all I know what … 
math
The length of a rectangle is 7 m less than triple the width. If w represents the width, write an expression for the length 
math
The length of a rectangle is 7 m less than triple the width. If w represents the width, write an expression for the length The length of a rectangle is 7 m less than triple the width. If w represents the width, write an expression … 
maths
the length of rectangle is x cm .the width of the rectangle is 4cm less than the length. A. write an expression in terms of x for the width of the rectangle B. write the expression for the perimeter of the rectangle in terms of x C. … 
math
the length of a rectangle is 3 meters less than twice its width. write an equation to find the length of the rectangle. the length of the rectangle is 11 meters. what is the width of the rectangle