Math Glossary Letter E earnings before interest and taxes noun Earnings Before Interest and TaxesRevenue - Operating Expenses EBIT noun Earnings Before Interest and TaxesRevenue - Operating Expenses eccentricity noun Deviation of a conic from a circular shape economics noun study of production, distribution, and consumption of goods and services edges noun line segment joining two vertices effective annual yield rate noun Yield rate taking compounding periods into effect effective interest rate noun the return on an investment or the rate owed in interest on a loan when compounding is taken into account. eigenvalue noun set of scalars associated with a linear system of equations elapsed time noun Amount of time between two dates elasticity noun the change in the behavior of buyers and sellers in response to a price change for a good or service electric noun the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. element noun an 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. elevation noun height above a given level, especially sea level eliminate noun to remove, to get rid of or put an end to elimination noun Eliminating a variable in a system of equations to solve for another variable or variables elimination method noun Eliminating a variable in a system of equations to solve for another variable or variables ellipse noun a 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 rule noun Provides 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 set noun The set with no elements∅ encryption noun encoding a message such that anybody outside authorized parties cannot read it endpoint noun end of a ray, line segment, or interval energy noun property that must be transferred to an object in order to perform work on engineering verb the application of science and mathematics by which the properties of matter and the sources of energy in nature are made useful to people entropy noun refers to disorder or uncertainty epsilon noun A letter of the greek alphabet used for math notation.Ε ε equal noun being the same in quantity, size, degree, or value= equality noun The 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 time noun determine time from cash flow streams equation noun a statement declaring two mathematical expressions are equal equation of a circle noun formula to graph a circle and the points on the circle(x - h)2 + (y - k)2 = r2 equation of a line noun formula to graph the points on a liney = mx + b equation of a plane noun formula to graph the points in a planeAx + By + Cz + D = 0 equation of exchange noun equation relating money, price, velocity, and quantityMV = PQ equilateral triangle noun A triangle with 3 equal sides equivalence noun the state or property of being equivalent. equivalent noun equal in value, amount, function, meaning equivalent annual cost noun formula comparing two different projects to see which one is more valuable equivalent coordinates noun Relating cartesian and polar coordinates equivalent expressions noun see equations equivalent fractions noun Two fractions with equal values, using a common factor to scale the numerator and denominator error noun difference between an observed value and the true value of a measurement. estimate noun an approximate calculation or judgment of the value, number, quantity estimate sum noun Using rounding to estimate the total of numbers using their rounded figures estimation noun rough calculation of a number or quantity eta noun A letter of the greek alphabet used for math notation.Η η euclidean norm noun magnitude or length of a vector euclids algorithm noun method for computing the greatest common divisor (GCD) of two numbers euclids extended algorithm noun division algorithm for integers euler noun Famous mathematician who developed Euler's constant Eulers Constant noun limiting difference between a harmonic series and natural logarithm0.5772156649 Eulers Formula noun Equation relating 5 mathematical constantseiπ + 1 = 0 eulers totient noun the number of positive integers that are relatively prime to evaluate noun To calculate the value of even number noun a whole number that is able to be divided by two into two equal whole numbers even numbers noun Numbers divisible by 2 event noun a set of outcomes of an experiment to which a probability is assigned. evil numbers noun A number with an even number of 1s in the binary expansion exabyte noun multiple of the unit byte for digital information exact time noun excel noun A spreadsheet software exchange matrix noun row-reversedr or column-reversed version of the identity matrix exchange rate noun The rate to convert one unit of currency to another unit of currency exercise price noun the price at which an underlying security can be purchased or sold when trading a call or put option expand polynomials noun Write out the multiplication of polynomials term by term expanded notation noun Writing out a number to show the sum of each digit multiplied by the place value9256 = 9(1000) + 2(100) + 5(10) + 6(1) expected noun results or observations that are predicted expected frequency noun computed 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 return noun amount of profit or loss an investor anticipates on an investment expected value noun predicted value of a variable or eventE(X) = ΣxI · P(x) expense noun the cost required for something; the money spent on something. A financial burden or outlay experiment noun In statistics, a controlled and repeatable process experimental value noun the value that is measured during the experiment. exponent noun The power to raise a number exponential noun of or relating to an exponent exponential distribution noun probability distribution that describes the time between events in a Poisson point process exponential fit noun Fit a curve to a set of data using an exponential function exponential growth noun growth whose rate increase in proportion to the total number exponential identity noun Identity using exponents for equivalent expressions exponential smoothing verb Create smoothed data using exponential functionsαxt - 1 + (1 - α)st - 1 export noun movable goods produced within the boundaries of one country, which are traded with another country exports noun goods and services produced in one country and purchased by citizens of another country expression noun finite combination of symbols exterior angle noun the angle between a side of a rectilinear figure and an adjacent side extended outward.