Question

Which expression correctly represents the perimeter of a rectangle that is 12 centimeters long and 7 centimeters wide?

Answer 1

Answer: $2(12\ cm)+2(7\ cm)$

Step-by-step explanation:

We know that the formula to find the perimeter of a rectangle is given b y:-

$P=2(l+w)$ , where l is length and w is width.

Then, the expression that correctly represents the perimeter of a rectangle that is 12 centimeters long and 7 centimeters wide will be :-

$P=2(12\ cm+7\ cm)\\\\=2(12\ cm)+2(7\ cm)$

Hence, D is the correct option.

Answer 2

D.
That is what i do 12 x 2 will equal 24 since the are 2 parallel sides like in a rectangle. and it will be the same concept on the other side 7 x 2 = 14 and 24 + 14 will equal 38 
hope this helped and is how you are supposed to work it