Mohammed went to a different movie theater where the relationship between the number of tickets and cost was not proportional. He noticed 3 tickets cost $21.

How much might 5 tickets cost if the relationship is NOT proportional?

i dont know if you cant find a way its best to actually add all of them start from 105 tho

step-by-step explanation:

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed