A rectangle has a length of 15 cm and a perimeter of 72 cm.

Which equation could be used to find the width of the rectangle?

A.

15w = 72

B.

w + 15 = 72

C.

2w + 15 = 72

D.

2w + 30 = 72

Question

A rectangle has a length of 15 cm and a perimeter of 72 cm.

 

Which equation could be used to find the width of the rectangle?
  
 
 

 
 

  

  A. 
 
15w = 72
   
   

 
 

  

  B. 
 
w + 15 = 72
   
   

 
 

  

  C. 
 
2w + 15 = 72
   
   

 
 

  

  D. 
 
2w + 30 = 72

anonymous · Answer

is it c?

anonymous · Answer

we know: perimeter is 72 cm, two sides are 15 cm each
you find perimeter by adding all the sides

|dw:1414708984729:dw|

side + side + side + side = perimeter
so add
15 + 15 + x + x = 72

I used x for the side lengths (width) that we do not know.

30 + 2x = 72