MATHS FORMULAS

Question	Answer
simple interest formula	PRN = principal x rate x number (years)
compound interest	P(1+r/n)^nt = principal ( 1 +rate/times compounded per year)^ times compounded per year x how many years.
depreciation formula	p(1-r/n)^nt = principal (1- rate/ times depreciated per year)^times depreciated per year x how many years
how to find net income	gross income - allowable deductions
how to find the slope of a line	y=mx +b
if a line is parallel to another line it has the same...	x axis
how do you tell if a line is perpendicular?	minus the reciprocal of the x axis
how do you find the equation of a line?	rise /run x x , y intercept
distance formula	√(x2-x1)^2 + (y2-y1)^2
gradient formula	y2-y1/x2-x1
midpoint formula	x1+x2/2 , y1+y2/2
what is general form	when the sum equals 0 instead of y
circumference of a circle	π x d
area of a square	b x h
area of a rectangle	l x b
what's the Pythagorean theorem ?	a2 + b2 = c2
rhombus	b x h
parallelogram	b x h
trapezoid	(b+b) x h / 2
circle	π x r^2
cyclinder surface area	2πrh + 2πr^2

Resource summary

	Created by Rylee Cruz almost 8 years ago