Answer: 40.
Explanation:
To evaluate the expression 5x³ for x = 2, follow these steps:
1) Replace the variable x with the given value of 2.
5(2)³
2) Simplify the expression inside the parentheses.
5(8)
3) Multiply the number outside the parentheses, 5, by the result of the expression inside the parentheses, 8.
5 * 8 = 40
Therefore, when x = 2, the expression 5x³ evaluates to 40.