Upgrade subject to access all content
A quilt is made of $7$ rows of squares consisting of $6$ squares each. To enlarge the quilt, Josh adds $2$ additional rows, then adds n squares to the end of each row.
Which expression represents the total number of squares in the quilt?
$ 9+6n $
$ 8(7+n) $
$ 54+9n $
$ 54n $