Is it possible for me to lose abut 10 pounds in a month? if so, how?

Im 17, 5'4, and weigh about 119. Im trying to get down to atleast 110 pounds. I have to fit into this dress i bought so yeah. I already know what to eat. But how many times should i go to the gym a week? and what should i do there? I already have a p i just dont know what machines to go on , how long to go on them for, and how many times a week.