Question

evaluate the expression for the replacement values given.
$3x^3$; $x = 5$
if $x$ is 5, then $3x^3 = \square$. (simplify your answer.)

Explanation:

Step1: Substitute \( x = 5 \) into the expression

We have the expression \( 3x^3 \), and we substitute \( x = 5 \) into it. So the expression becomes \( 3\times(5)^3 \).

Step2: Calculate the power

First, calculate \( 5^3 \). \( 5^3 = 5\times5\times5 = 125 \).

Step3: Multiply by 3

Now, multiply the result by 3: \( 3\times125 = 375 \).

Answer:

375