Write an inequality for the situation. All real numbers y that are less than 4 or greater than 9

Solution:

a < b refers to that number b is bigger than number a,

a ≤ b refers to that number b is bigger or equal to number a.

The non-equal comparison between the mathematical expressions is called an inequality.

It is given that “All real numbers y that are less than 4”

It can be written as

y < 4

It is given that “All real numbers y that are greater than 9”

It can be written as

y > 9

So the situation can be written as y < 4 or  y > 9.

Therefore, the situation for the inequality is y < 4 or y > 9.

Write an inequality for the situation. All real numbers y that are less than 4 or greater than 9

Summary:

The situation for the inequality “All real numbers y that are less than 4 or greater than 9” is y < 4 or y > 9.