Answer:
2
Step-by-step explanation:
This is a linear function, written in the form y=mx+b, where m is the slope, or how many dollars each ticket costs in the case, and b is the initial value of the function, or in this case the cost before any tickets are added to the account.
Since 4x is the slope (4 times however many tickets one purchased), 2 is the initial value before we buy tickets.
You can also plug in 0 for x and get 
Hope I helped :D

80/10=8 packages of plates
80/16=5 packages of napkins
80/8=10 packages of cups
Answer:
22
Step-by-step explanation:
The centroid divides a median in two parts that have this ratio = 1/3 and 2/3
In particular the part between the vertex and the centroid is 2/3 of the median.
So we have:
XN = (33 * 2)/3 = 22