Gary buys a box of mechanical pencils, and a tube of 8 refill leads. Each pencil contains 3 leads. Gary puts the tube of refill leads into his pencil case, then adds one pencil at a time. What is the algebraic expression for the number of leads in the pencil case for any number of pencils?

in mathematics, a function is a relationship between two variables such that the value of one of the variables, called the dependent variable, is determined by the value of the other variable, called the independent variable. there is a specific term we use to describe the set of independent variables of a function.

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step-by-step explanation:

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a is the right answer