1. Why can we not use first differences when we have independent cross sections in two years (as opposed to having panel data)

Find the axis of symmerty for x y=x squared -4x-8

Robert has 78 tomato lants and 56 cucumber plants .he wants to plant them in rows that only have one type of plant in each row with the same number of plants in each row. how many plants should he put in each row and how many rows of each type of plant will he need

Write the point slope form of the equation of the line passing through the points (-5, 6) and (0.1).