The following are good resources if you need a little extra help in math.
Khan Academy is always a great resource. Click on the link below and when you get to the site type in the concept you would like to review. www.khanacademy.org
Corbettmaths is also a good site. I suggest you choose videos and worksheets. Then choose the video topic you want to watch. corbettmaths.com
Desmos is an online graphing calculator. The link below is the Arizona version that you will be able to use on the AZMerit test. I suggest you save the site as a favorite so you can us the calculator and become familiar with it. www.desmos.com/testing/arizona/graphing
Mathhelp.com is also a great resource. I have given you the link right to the Algebra 1 resources. Click the topic you would like to review and it will then give you a bunch of subtopics to click on. When you first click on the link it will show you the simplifying subtopics. www.mathhelp.com
Another option is YouTube. There are thousands of videos online. I would just caution you to make sure the video you are watching is not a project done by students. You can not always count on them being correct. www.youtube.com