Evaluate the following. vert 12vert =12 vert -4vert =

## Step 1<br />The problem involves the concept of absolute value. The absolute value of a number is its distance from zero on the number line, regardless of direction. It is always a non-negative number.<br /><br />## Step 2<br />The absolute value of a number \(x\) is denoted as \(|x|\). If \(x\) is positive or zero, then \(|x| = x\). If \(x\) is negative, then \(|x| = -x\).<br /><br />## Step 3<br />In this problem, we are asked to find the absolute value of -4. Since -4 is a negative number, we apply the rule that the absolute value of a negative number is the number without the negative sign.