Final answer:
To write the word sentence as an inequality, we can translate the given statement into an inequality: x + 2 ≤ 5.1. To solve the inequality, subtract 2 from both sides to isolate the variable x: x ≤ 3.1.
Step-by-step explanation:
To write the word sentence as an inequality, we can translate the given statement "A number x plus 2 is less than or equal to 5.1" into an inequality. The symbol '≤' means 'less than or equal to'. So, the inequality is: x + 2 ≤ 5.1.
To solve the inequality, we need to isolate the variable x. We can do this by subtracting 2 from both sides of the inequality: x ≤ 5.1 - 2.
Simplifying the right side of the inequality gives us: x ≤ 3.1. This means that any number less than or equal to 3.1 is a solution to the inequality.