# Mathematics 8 reference sheet

## Number and proportional reasoning

p%=fracp100,qquad textunit rate=fractextquantity1text unit

textpercent change=fractextnew-textoriginaltextoriginaltimes100%

## Fractions

frac ab+frac cd=fracad+bcbd,qquad frac abcdotfrac cd=fracacbd,qquad frac abdivfrac cd=frac abcdotfrac dc

## Algebra

y=mx+b,qquad ax+b=cRightarrow x=fracc-ba

## Geometry

V=Bh,qquad SA_textcylinder=2pi r^2+2pi rh,qquad V_textcylinder=pi r^2h

a^2+b^2=c^2

## Data and probability

barx=fracsum x_in,qquad P(Acap B)=P(A)P(B)text for independent events
