You mailed 3 identical letters weighing more than 1 ounce each. mailing each letter cost $.37 for the first ounce, plus $.23 for each additional ounce. each letter required $1.29 postage. how much did each letter weigh, to the nearest ounce?

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?