First distribute the 5
3x + 2 ≤ 5x – 20  subtract 3x from both sides: 2 is on the left side and the right side is 2x -20
2 ≤ 2x – 20  now add 20 to both sides
22 ≤ 2x  divide both sides by 2
11 ≤ x  now match with the answer

Certainly answer (2) 750 minutes is a LOT longer than 12.5 seconds.
Answer (4) is more than half an hour (.5 hours)
Since 12.5 seconds is less than a minute we can find our answer from the remaining two answers pretty easily:

PS Dan is pretty fast!! https://www.quora.com/Whats-a-good-100m-sprint-time

Which of these numbers are in between 7.0 and 7.8?
It could have been more complicated than that but if we try the other answers, for example, 8.8 and add that to 7.2 and 7.6 and then divide by 3, the result will not be between 7.2 and 7.6.
Students have 3 hours so they can prove that the other anseers also do not work and find their answer.  2 points!!

Read carefully — this is an easy 2 point giveaway:
The total number of tickets is 150 and a is how many adult tickets and c is how many child tickets.  The adult ticket is $10.25 and the child ticket is $7.75 so this has to go with the $$.

The x values are the same in all 4 answer choices.  We need to focus on the y-values!
One of the best definitions of a linear function is “every time x changes by 1, y changes by the same amount”.  We can determine this by looking at the differences in the y values or f(x), g(x), h(x) or k(x)
(1) f(x): each time the x value goes up by 1 the y value goes up by how much?
(2) g(x) is each change the same?  (from -1 to 1 is a difference of 2 but from 1 to 5 is a difference of 4)
(3) h(x) is each change the same?  from 9 to 12, it changes by 3 but then from 12 to 17, it changes by 5
(4) k(x), is each change the same?  from -2 to 4, the change is 6, but from 4 to 14 the change is 10

That’s it — you just found the linear function!! 2 points!