Janelle takes 3 dance classes each week. ballet class is 45 minutes long, modern dance is 50 minutes long, and jazz class is 35 minutes long. how many hours of dance class does janelle have in 2 weeks?

1

step-by-step explanation:

you are throwing one dart

, 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