Area of a rectangle 8cm long and 4cm in height. tell me how to do this also, i'm so confused.

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Percy rides his bike 11.2 miles in 1.4 hours at a constant rate. write an equation to represent the proportional relationship between the number of hours percy rides, x,and the distance in miles, y, that he travels.

Aculinary club earns $1360 from a dinner service. they sold 45 adult meals and 80 student meals. an adult meal costs twice as much as a student meal. what is the cost of an adult meal?