Math Glossary Letter Eearnings before interest and taxesnounEarnings Before Interest and Taxes
Revenue - Operating Expenses
EBITnounEarnings Before Interest and Taxes
Revenue - Operating Expenses
eccentricitynounDeviation of a conic from a circular shape
economicsnounstudy of production, distribution, and consumption of goods and services
edgesnounline segment joining two vertices
effective annual yield ratenounYield rate taking compounding periods into effect
effective interest ratenounthe return on an investment or the rate owed in interest on a loan when compounding is taken into account.
eigenvaluenounset of scalars associated with a linear system of equations
elapsed timenounAmount of time between two dates
elasticitynounthe change in the behavior of buyers and sellers in response to a price change for a good or service
electricnounthe set of physical phenomena associated with the presence and motion of matter that has a property of electric charge.
elementnounan element (or member) of a set is any one of the distinct objects that belong to that set. In chemistry, any substance that cannot be decomposed into simpler substances by ordinary chemical processes.
elevationnounheight above a given level, especially sea level
eliminatenounto remove, to get rid of or put an end to
eliminationnounEliminating a variable in a system of equations to solve for another variable or variables
elimination methodnounEliminating a variable in a system of equations to solve for another variable or variables
ellipsenouna regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points (the foci) is constant
empirical rulenounProvides estimate for the spread of data in a normal distribution. 68% of the data will fall within one standard deviation of the mean. 95% of the data will fall within two standard deviations of the mean. 99.7% of the data will fall within three standard deviations of the mean
empty setnounThe set with no elements
∅
encryptionnounencoding a message such that anybody outside authorized parties cannot read it
endpointnounend of a ray, line segment, or interval
energynounproperty that must be transferred to an object in order to perform work on
engineeringverbthe application of science and mathematics by which the properties of matter and the sources of energy in nature are made useful to people
entropynounrefers to disorder or uncertainty
epsilonnounA letter of the greek alphabet used for math notation.
Ε ε
equalnounbeing the same in quantity, size, degree, or value
=
equalitynounThe state of being equal. A relationship between two quantities or two mathematical expressions, asserting that the quantities have the same value, or that the expressions represent the same mathematical object
equated timenoundetermine time from cash flow streams
equationnouna statement declaring two mathematical expressions are equal
equation of a circlenounformula to graph a circle and the points on the circle
(x - h)2 + (y - k)2 = r2
equation of a linenounformula to graph the points on a line
y = mx + b
equation of a planenounformula to graph the points in a plane
Ax + By + Cz + D = 0
equation of exchangenounequation relating money, price, velocity, and quantity
MV = PQ
equilateral trianglenounA triangle with 3 equal sides
equivalencenounthe state or property of being equivalent.
equivalentnounequal in value, amount, function, meaning
equivalent annual costnounformula comparing two different projects to see which one is more valuable
equivalent coordinatesnounRelating cartesian and polar coordinates
equivalent expressionsnounsee equations
equivalent fractionsnounTwo fractions with equal values, using a common factor to scale the numerator and denominator
errornoundifference between an observed value and the true value of a measurement.
estimatenounan approximate calculation or judgment of the value, number, quantity
estimate sumnounUsing rounding to estimate the total of numbers using their rounded figures
estimationnounrough calculation of a number or quantity
etanounA letter of the greek alphabet used for math notation.
Η η
euclidean normnounmagnitude or length of a vector
euclids algorithmnounmethod for computing the greatest common divisor (GCD) of two numbers
euclids extended algorithmnoundivision algorithm for integers
eulernounFamous mathematician who developed Euler's constant
Eulers Constantnounlimiting difference between a harmonic series and natural logarithm
0.5772156649
Eulers FormulanounEquation relating 5 mathematical constants
eiπ + 1 = 0
eulers totientnounthe number of positive integers that are relatively prime to
evaluatenounTo calculate the value of
even numbernouna whole number that is able to be divided by two into two equal whole numbers
even numbersnounNumbers divisible by 2
eventnouna set of outcomes of an experiment to which a probability is assigned.
evil numbersnounA number with an even number of 1s in the binary expansion
exabytenounmultiple of the unit byte for digital information
exact timenounexcelnounA spreadsheet software
exchange matrixnounrow-reversedr or column-reversed version of the identity matrix
exchange ratenounThe rate to convert one unit of currency to another unit of currency
exercise pricenounthe price at which an underlying security can be purchased or sold when trading a call or put option
expand polynomialsnounWrite out the multiplication of polynomials term by term
expanded notationnounWriting out a number to show the sum of each digit multiplied by the place value
9256 = 9(1000) + 2(100) + 5(10) + 6(1)
expectednounresults or observations that are predicted
expected frequencynouncomputed by multiplying the probability that an event occurs by the total number of possible times that the event could occur.
Expected Frequency = (Row Total * Column Total)/N
expected returnnounamount of profit or loss an investor anticipates on an investment
expected valuenounpredicted value of a variable or event
E(X) = ΣxI · P(x)
expensenounthe cost required for something; the money spent on something. A financial burden or outlay
experimentnounIn statistics, a controlled and repeatable process
experimental valuenounthe value that is measured during the experiment.
exponentnounThe power to raise a number
exponentialnounof or relating to an exponent
exponential distributionnounprobability distribution that describes the time between events in a Poisson point process
exponential fitnounFit a curve to a set of data using an exponential function
exponential growthnoungrowth whose rate increase in proportion to the total number
exponential identitynounIdentity using exponents for equivalent expressions
exponential smoothingverbCreate smoothed data using exponential functions
αxt - 1 + (1 - α)st - 1
exportnounmovable goods produced within the boundaries of one country, which are traded with another country
exportsnoungoods and services produced in one country and purchased by citizens of another country
expressionnounfinite combination of symbols
exterior anglenounthe angle between a side of a rectilinear figure and an adjacent side extended outward.
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