Maths year 9 revision A+ RATED 100%

Maths year 9 revision Distance speed time - correct answers Distance ____________ Speed *time Strait line - correct answers Y=Mx+c Factorizing quadratic's (Doodle bracket) - correct answers Example: X2+8x+15 Add up to 8 Multiple to 15 Decreasing by a % - correct answers Subtract the % it is being reduced by. Frome 100%. Make that % a multiplayer. Eg 96%=0.96 Times that by original % change - correct answers Change _______ * 100 Original Reverse %. (When not told original) - correct answers New price is more than 100% Ex. 104% = 182 182 ____ 1.04 = 175 Standard form - correct answers Put decimal point after first number Then put the number to the power of the number of digest after decimal point. Inter Quatile range - correct answers Middle 50% Highest common factor. (HCF) - correct answers Make prime factor tree of 2 numbers Times the common prime factors together FROM ONE TREE Lowest common multiple - correct answers Multiple the HCF and all he remaining prime factors. (From both trees) Ratio - correct answers Add the ratios together Then divide by the number you need by ratio added together Area of triamgle - correct answers Base * height. Divided by 2