Find the area of the shaded area with steps please

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

What is the result of adding the system of equations? 2x+y=4 3x-y=6

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?