SHOW UR WORK PLEASE HELP DUE IN A COUPLE MINUTES D: A stack of index cards is 3/4 of an inch tall. If each card is 3/160 of an inch thick, how many index cards are in the stack?

each card's thickness ×no of cards=total thickness

3/160×X=3/4

X=3/4×160/3

X=40

40 cards r in the stack

, 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: what statements

step-by-step explanation if you write the statements down then i could you.