When you buy a dozen bagels for $2.39 , you get an additional bagel free. what is your cost per bagel?

its about 20 cents per bagel

Step-by-step explanation:

All i did was divide 2.39 by 12 and just rounded up the 0.19916666666 to 0.20

.18

Step-by-step explanation:

You do 2.39 divided by 13 to get .183 but round to 18 cents per bagel

, 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