Math Equations Flashcards
Simple Interest Equation
V=P(1+rt/100)
where P=principal, r=rate and t=time
Compound Interest Equation
V=P(1+r/100n)^nt
where P=principal, r=rate, t=time, and
n=the number of times compounded per year
Work Rates Equation
1/TotalWork=(1/workrate1)+(1/workrate2)
Sets Equation
A+B-(AUB)
Distance Equation
D=rt
Distance=rate(time)
Area of a circle
A=(pi)r^2
Circumference of a Circle
C=2(pi)r
Arc Length of a Circle
Arc Length= (x/360)2(pi)r
Area of Sector for a Circle
Area of Sector=(x/360)(pi)r^2
Area of a Trapezoid
height x [(base1+base2)/2]
Total Degrees of a polygon
Total degrees=180(n-2)
where n=# of sides
Degree Measure of a Congruent Polygon
Degree Measure= 180(n-2/n)
Distance Formula
sqare root of [(x-x)^2]+[(y-y)^2]
Is 1 prime?
No
____ is the smalles prime and the only even prime number
2
Fast Fractions
1/x+1/y=(x+y)/xy
Combination Formula
nCr=n!/[r!(n-r)!]
Permutations Formula
nPr=n!/(n-r)!
Probability formula
Probability of an event=
(number of ways that fir the requirement)/
(number of total ways)
