Unit 3 - Notes.docx - Letters are used to represent...

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Letters are used to represent variables. Letters often used for variablesare x,y,a,b,and c.A variable is a letter that represents a number or quantity whose value may change.A constant is a number whose value always stays the same.An expression is a number, a variable, or a combination of numbers and variables and operation symbols.An equation is made up of two expressions connected by an equal sign.What is the degree of the polynomial, 2x2z2– 2xyz + x5yzExamine the terms.

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