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Find the midpoint m of z1=(8+5i) and z2=(12+3i)

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?

Which of the following vectors are orthogonal to (2,1)? check all that apply