Rebecca opened up a checking account and has limited transactions. She can only make 20 transactions each month. If it is May 15th, and she has already had 15 transactions, and she averages 1 transaction per day, will Rebecca be under her transaction limit for the month of May? Yes, she doesn’t have a limited transaction account.
Yes, she will have enough transactions left to make it to May 31st.
Yes, she can add more transactions.
No, she will not have enough transactions left to make it to May 31st.

, 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

i dont know what you want me to answer for this but im guessing 2: 11?

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1