What does ex mean in math?

Expected value or E(X) EX (calculator key), to enter powers of 10.

What means in math?

It is the sum (total) of all the values in a set of data, such as numbers or measurements, divided by the number of values on the list. To find the mean, add up all the values in the set. Then divide the sum by how many values there are. That is the mean.

How do you use the summation symbol?

The symbol Σ (sigma) is generally used to denote a sum of multiple terms. This symbol is generally accompanied by an index that varies to encompass all terms that must be considered in the sum. For example, the sum of first whole numbers can be represented in the following manner: 1 2 3 ⋯.

How do you solve 2x+3=15 with the algebra calculator?

Learn how to use the Algebra Calculator to check your answers to algebra problems. Solve 2x+3=15. First go to the Algebra Calculator main page. First type the equation 2x+3=15. Then type the @ symbol. Then type x=6. Try entering 2x+3=15 @ x=6 into the text box.

What is the least common multiple of 3 and 5?

For adding, subtracting, and comparing fractions, it is suitable to adjust both fractions to a common (equal, identical) denominator. The common denominator you can calculate as the least common multiple of both denominators – LCM (3, 5) = 15.

How to write two thirds plus three fifths as a fraction?

In the next intermediate step, the fraction result cannot be further simplified by canceling. In words – two thirds plus three fifths = nineteen fifteenths. Fractions – use the slash “/” between the numerator and denominator, i.e., for five-hundredths, enter 5/100.

How do you write three quarters divided by two fifths?

In words – three quarters divided by two fifths = fifteen eighths. Fractions – use the slash “/” between the numerator and denominator, i.e., for five-hundredths, enter 5/100. If you are using mixed numbers, be sure to leave a single space between the whole and fraction part.