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Q: A letter used to represent a number in equations or expression?
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What is the definition for variable?

the def for variable is a letter or symbol used to represent a missing number in an algebrac expression


What does the letter n represent in maths?

In math, the letter "n" is commonly used as a variable to represent a number that is not specified. It is often used in equations and formulas to indicate a variable quantity that can take on different values.


What is the letter that represent the composite number?

The letter that represent the composite number is letter C.


Can one number represent an algebraic expression?

Yes it can


What is an expression for 20 times a number?

If x is used to represent the unknown number, then the expression for 20 times a number would be 20x.


Explain why x does not necessarily represent a positive number?

x may not always represent a positive number because there are equations that make a variable a negative number


Which whole number does the expression represent 2.7x10 6?

It is 2700000.


What do the letters mean in algebraic equations?

The letters in most algebraic equations mostly represent the value of the number or often at times the gradient.


Letter used to represent a number?

A letter used to represent a number is a variable of sometimes a constant.


What is a letter or symbol used to represent an unknown value?

If you are talking about math then its usually " x " but if that is already use in the expression and you want to use another symbol to represent a DIFFERENT number then you can use y or a or so on.


What is algebraic strategy for solving a system of equations when two expressions are the same?

An expression is the algebraic representation of a number - an expression has a numeric value.An equation is an algebraic statement claiming that two expressions have the same numeric value. The equation has a Boolean value (true or false).If two equations can be expressed in an identical manner (the same expression on both sides) - then these equations are the same equation.In order for a system of equations to have a solution, the number of different equations in the system must be equal to the number of variables in the system. If there are more distinct equations than there are variables, than the system has no solution. If there are less, then the system may have no solution, or infinitely many solutions.In the case described there is most likely an infinite number of solutions


How do you write an algebraic expression to represent a verbal expression?

add 3 to a number a number plus 3 the sum of a number and 3 3 more than a number a number increased by 3