Let x be the number of minutes.

To make 3 sandwiches per minute.

To make at least 150 sandwiches in x minutes.

The word the product of 3 and x is greater than or equal 150 represent the inequality is .

The inequality is and solve for x.

Apply division property of inequality: if then .

Divide each side by 3.

Cancel common terms.

The solution of the inequality is . It will take at least 50 minutes to make the number of  sandwiches.

It will take at least 50 minutes to make the number of  sandwiches you need.