Question

Mr. O'Neal prints a variety of sizes of a rectangular poster to hang around his school. The perimeter of each rectangular poster can be represented by the expression below.



2
(
4
n
+
10
)



Mr. O'Neal wants to write an equivalent expression that represents the perimeter of the rectangular poster as the sum of the four side lengths.



Which of the following best represents what Mr. O'Neal wants to write?


4
n
+
10
+
4
n
+
10


8
n
+
20


28
n


2
n
+
5
+
2
n
+
5

Answer 1

4n + 10 + 4n + 10

Explanation: 2(4n + 10) = (4n + 10) + (4n + 10) = 4n + 10 + 4n + 10, which is the sum of the four side lengths (two sides 4n and two sides 10).