Each square on laura's chessboard is 13 square centimeters. a chessboard has 8 squares on each side. to the nearest hundredth, what is the width of laura's chessboard?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

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 ?

Ineed big ! the cost of a school banquet is $25 plus $15 for each person attending. create a table, sketch the graph, and write an equation in slope-intercept and point-slope form that gives total cost as a function of the number of people attending. what is the cost for 77 people?