This is for A part A: It shows that the least amount is 37.5 minutes
It shows the most amount of time is 60 minutes
One thing it does not show is how many students where in the class.
Answer:

Step-by-step explanation:
On Friday, there were x students at the baseball game.
On Monday, there were 1/2 as many students, that is: x/2 students
On Wednesday, there were 32 fewer students at the game as there were on Friday, that is x - 32.
Tickets are sold for each student. Therefore, the number of tickets sold on all three days will be the same as the number of students that were at the games on the three days.
The number of students present on the three days is:
x + x/2 + x - 32

The number of tickets sold can therefore be represented by 
If triangle MNO is congruent to triangle PQR then side OM is congruent to side RP and equals 9
For the second problem the answer D, -9, -11
400 Imperial pints are less than 100 Imperial gallons,
400 pints = 50 gallons.