Using a Protractor..
It's a little plastic half circle thingy with angle measurements on it.
see image below
7<em>m</em> + 10<em>c</em> (is less than or equal to) 100.
<em>m</em> stands for months and <em>c</em> stands for CDs.
I hope this helps! :)
What in the world.. weirdest thing that i saw today
Call the width ' W '.
Then the length is W + 55
Perimeter (distance all around) = W + (W+55) + W + (W+55) = 4W + 110
4W + 110 = 1,310
4W = 1,200
W = 300-ft
Length = W + 55 = 355-ft