Amy picks a whole number, squares it and then subtracts 1. She gives her final number to Brian. Brian adds 3 to the number Amy gave him and then doubles that result. Brian's final result is 54. With what number did Amy start?

5

Step-by-step explanation:

5x 5 = 25

25-1= 24

24+3=27

27+27=54

54

Step-by-step

5x 5 = 25

25-1= 24

24+3=27

27+27=54

answer: i realy don't get it that much can you me figer it out pleas you

step-by-step explanation:

, 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