Roberto purchased airline tickets for his family of 4. the tickets cost $1,250. the airline also charged a luggage fee, bringing the total cost to $1,400. what is the percent increase in the cost due to the luggage fee?
the cost increase was 12%.
the cost increase was 20%.
the cost increase was 48%.
the cost increase was 89%

the answer is the increase was 12 percent.

Step-by-step explanation:

just took the test

choice b is correct

step-by-step explanation:

we have been given the following system of linear inequalities;

we are required to graphically determine the solution to these system of inequalities. using a graphing tool, the solution is as shown in the attachment below;