Someone me figure out the equation for this

  89 adult tickets were sold

Step-by-step explanation:

The problem tells you that 2 of every 3 tickets sold were student tickets. So 1/3 of the tickets sold were adult tickets.

  (1/3)·269 tickets = 89 tickets

When a problem statement tells you the ratio of different items, it often turns out to be convenient to group the items using that ratio. Here, since 2 student tickets were sold for each adult ticket, that means a convenient group is 1 adult ticket and 2 student tickets, a total of 3 tickets. Now, anything to do with numbers of tickets can be figured on the basis of there being 267/3 = 89 groups. In 89 groups of tickets, there will be 89 adult tickets.

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation:

d. you cannot tell because there are no values shown.