What is the opposite of -18

1. 18
2. 81
3. 8
4. 80

Rectangle leg this 11feet and perimeter of 38feet what is the width of the rectangle in feet

Math question.. plz me .. best answer all

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?