Solve the equation 18+k=30

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

In the diagram, be and ad pass throughthe center of circle o, and the area ofsector aoc is 47.45 square units. what isthe area of sector boc? use the value =3.14, and round your answer to two decimalplaces.22.33 square units25.12 square units

A+b= 17, ab=70, find the value of |a-b|