Kathleen made a scale drawing of a house and its lot. the scale she used was 2 millimeters = 1 meter. the front patio is 11 meters wide in real life. how wide is the patio in the drawing?

The given scale is
2 mm = 1 m
multiply both sides by 11 to turn the "1 m" into "11 m" 

so we get
11*(2 mm) = 11*(1 m)
(11*2) mm = (11*1) m
22 mm = 11 m

This means that 11 meters in real life corresponds to 22 millimeters on the page

22 mm