Ella buys a book and a pen for $14. the cost of the book is $2 more than twice the cost of the pen. write a system of linear equations for the situation. then find the cost of each item. let x represent the cost of the pen, and let y represent the cost of the book.

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units