The length of a rectangle is three times longer than its width. The perimeter of the rectangle is 16 feet. If x represents the width of the rectangle, which equation can be used to find its value?
3x + x = 16
(3x)(x) = 16
3x + 3x + x + x = 16
3x + 3x + x = 16

Question

The length of a rectangle is three times longer than its width. The perimeter of the rectangle is 16 feet. If x represents the width of the rectangle, which equation can be used to find its value?
3x + x = 16
(3x)(x) = 16
3x + 3x + x + x = 16
3x + 3x + x = 16

welshfella · Answer

the length of the rectangle will be 3x
the width is x
perimeter = 2 * length + 2 * width

welshfella · Answer

or  another way to write it would be
width + width + length + length = perimeter

 - just fill in the values

welshfella · Answer

replace width by x and so on...

anonymous · Answer

So C?