The problem is to solve the inequality $u + 16 \ge 20$ and graph the solution on a number line.

1. Problem Description

The problem is to solve the inequality $u + 16 \ge 20$ and graph the solution on a number line.

2. Solution Steps

First, we need to isolate the variable $u$. To do this, we subtract 16 from both sides of the inequality:

$u + 16 - 16 \ge 20 - 16$

$u \ge 4$

The solution to the inequality is $u \ge 4$. This means that $u$ can be any number greater than or equal to

4.

To graph the solution, we need to draw a number line. Place a closed circle (or a filled-in circle) at 4 to indicate that 4 is included in the solution set. Then, draw an arrow to the right to indicate that all numbers greater than 4 are also included in the solution set.

3. Final Answer

$u \ge 4$