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what are some of the subjects wud i need to know before taking an act

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as far as the math goes - algebra - solve for x, factoring, evaluating functions, and being able to interpret a function on a graph. geometry (no proofs) area perimeter are fair game, area of shaded regions (multiple shapes on top of each other) theres 4 trig questions (sohcahtoa, basic basic basic trig identities, evaluating the graph of sin cos and tan) there may be a question or 2 on matrices and theres one or 2 questions on logs.   theres some probability and statistics (usually in word problems) as for science - you dont NEED to know the science, it will absolutely help, but the test is about interpreting graphs and experiments. it will help if you touch up on chem, bio, earth science, basic physics, and cosmology (space stuff.) its mostly reading comprehension, just make sure you read the synopsis before each experiment or scientist point of view and read the explanation on each graph. the science part is kind of a rush so i would recommend to do the passages based on graphs first bc they are usually the quickest. im not too familiar w/ the reading and writing parts but im sure someone else will comment
For the Math Section} Number Properties: Adding and subtracting Signed Numbers, Multiplying/ Dividing Signed Numbers, PEMADS ( Order of Operations), Absolute Value, Counting Consecutive Integers.Divisibility: Prime Factorization, LCM, GCF      Factions and Decimals Percent  Ratios, Proportions, and Rates.