Which is the best estimate of 28x0.64

Let r = 3. what is the value of r + 58?

For what value of x does 4x = (1/8) x + 5?

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?