Random between 550 and 300

ok quick question this has been killing me i cant find the answer anywhere.

anyways i want to make a movie clip load in a random spot between 300 and 500 on the x axis.

so how would i do that with this code

_x = random(550)

i know its something with a “&”

_x= (Math.random()*200) + 300;

where 200 is the range and 300 is the starting index