At the beginning of this month, trista had $229.43 in digital money. so far this month she has made deposits of $63.10, $38.77, and $51.59 into her account, while she has made withdrawals of $16.72, $82.23, and $43.37. how much digital money does trista have now?

, 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

its the second choice.

step-by-step explanation:

the elements in the range will be 7 less than the elements in the domain.