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The word "variable" represents an unknown number.

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Q: What do you use to represent unknown numbers?
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Why do you use negative numbers in Math?

You use negative numbers to represent subtractions (10-5 is same as 10 + -5) Also, you use these to represent things that can be negative.


Why do we use fractions?

the wat to represent quanites that we cant represent with whole numbers.


What is useful to decide when to use numerals or words to represent numbers in a sentence?

If the number is below ten, then you would use words to represent the numbers, when they are above ten, you use the number (:


What does the letter a mean in math?

In algebra, letters like a, b, x, y, all represent numbers. We use letters like this when we have an unknown number.


What is done to a variable represent an unknown quanity?

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Solve a number increased by nine is fifteen?

Let x represent the unknown number and use the known numbers to solve. Set up the equation: x + 9 = 15 (subtract 9 from each side to solve for the unknown number) x = 6


What is it called when you use symbols to represent numbers?

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The branch of mathemematics that nuses letter called variables in places of numerals?

Algebra uses letters to represent unknown numbers.


A branch of mathematics that use letters to represent numbers called what?

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To use numerals or words to represent numbers in a sentence?

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How are variable expressions used to represent a quantity?

They are used to represent known and unknown values in equations. Usually x, y, and z are unknown; and a, b, and c are known. But u can use anything to represent anything! It helps to solve for unknowns that you need to figure out!


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

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