Final answer:
An algebraic expression for 'the product of a number and 17' is written as '17x' or '17 × x'.
Step-by-step explanation:
To write an algebraic expression for "the product of a number and 17," we denote the number by a variable, usually x, and then use multiplication to indicate the product. Therefore, the expression is 17x or 17 × x, where 'x' is the variable representing the number. When we calculate this expression, we simply multiply the value of 'x' by 17 to get the result.