What is the length of the diagonal, d, of the cube shown below?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Rewrite so the subject can be y in the formula d=m-y/y+n

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?