Which of the following statements about a variable are true? a, a variable is represented by a letter. b, a variable cannot be subtracted. c, a variable represents a quantity. d, a variable cannot be multiplied.

The statements that are true are a and c.

Step-by-step explanation:

In many equations you can see that the variable is either subtracted or multiplied, however, in no equation will you see a variable that does not represent some form of a quantity or where it is not represented by a letter.

i dont know

step-by-step explanation:

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note: the best i know.