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6 Cards in this Set
- Front
- Back
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what is a variable
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letter that is written next to a number or stands alone. example x or 6x, or x +5=30 so x would = 25 or 6x + 5= when x =3, so 6*3=18, so 18+5=23
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constants
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when part of a rule does not change example c+5 5 is the constant
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expression
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it representstells the rule for ordering example c+5 you can use any letter you like for the variable part of an expression such as x +5, or n+5, but you should use a letter that reminds you of what it stands for.
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writing an expression and identifying the variable and constant
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c-10 in this expression c is the variable and 10 is the constant
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evaluate variable expressions for given replacement value
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example book ordering for a college bookstore figure out how many is needed for a class you use a specific value for the class limit, like 25 students in prealgebra, then you evaluate the expression example c+5, so c=20 +5 =25 if say limit was 40 then c+10 which would mean that c is 30
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coefficent
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the number part in a multiplication expression, usually multiplication is not written in an expression so the use of 4*s is given we write it as 4s 4 is the coefficent and s is the variable but if an expression uses +,-,or divide the symbol is used
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