Frances can complete 91 oil changes in seven days how many oil changes can frances complete and 11 days

143

Step-by-step explanation:

divide 91 by seven. this will tell you how many oil changes happened in one day . ( answered 13) once you know that just times your answer by 11

they can both be solutions depends on the equation

step-by-step explanation:

what is the equation? ?

, 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