A length of one side of a rectangular flag is 21.6 inches. The flag has a red stripe across its diagonal that is 36 inches long. Which value is closest to
the length of the other side of the flag?

a
10.6
b
28.8
c
42
d
57.6

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)

i believe the correct answer is b.

, 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

you can use a^2+ b^2=c^2