Cheatography

# SAT Math basic concepts Cheat Sheet (DRAFT) by taotao

This is a draft cheat sheet. It is a work in progress and is not finished yet.

### Basic concept

 Basic concepts algebra numbers power /sqrt different format of same expression MADSPM­:mu­lti­pli­cat­ion­/di­vis­ion­/power multiply 30=1;31=3;1n=1 minus power: recipr­ocal, 3-1=1/3; 3-2=1/sqrt(3) square root:x1/2 Solve the equeation move variables to onside; do same op on both side Solve the inequa­lit­ies­:same as equation, negative change direction Solving ration equati­on:­common denomi­nator; zero denomi­nut­or(no solution); infinite solution Absolute number Solution is negative? simult­aneous equation multip­le/­add­/su­btract together; solve the equation to get the solution Word =>e­quation is, are, were, did, does, costs =; what (or any unknown value) any variable (x, y, k, b) ; more, sum + ; less, difference − of, times, product × (multiply) ratio, quotient, out of, per ÷ (divide)

### Geometry

 coordinate plane slope-­int­ercept form y=ax+b parallel lines: no solution perpen­dicular lines: negative reciprocal slope) distance formula Pythag­orean triplets 3-4-5,­5-12-13 sqrt((­x1-x2)2 + (y1-y2)2) midpoint formula point of inters­ection solve x: formula 1=formula 2 solve y: plug back in x Other: PITA(a­rit­hme­tic), graph (no linear)

### Charts and graphs

 Scatte­rplot Line Graph Bar Graph (or Histogram) Two-Way Table Figure Facts variable, unit, relati­on,­legend ruler probba­bility # of outcomes you want/ #of possible outcome GRIDS-INS