The watch bea would like to buy cost $10 less than two times the amount she has saved watch cost $50 how much money does Bea have saved choose the steps that show how do you solve this problem using arithmetic

, 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

answer is  

c.

56

hope you get this right

i’m kinda new to precal but your answer should be 21. hope i got it right.

step-by-step explanation: