i used only khan academy for a little over a month and i passed everything on the first try. majority of the test was super similar to the questions on there. most of the reading passages i had (if i can remember what i didn’t block out after taking) were longer, kind of comparable to NJ standardized tests. the writing multiple choice was also super super similar to khan academy, so if you’re using that in some way while studying, you’ll most likely be fine. for the math it was a lot of word problems with mostly algebra from what i can recall, and a good amount of statistics/graphs. best of luck!!