The dollar values take into account the changes in the economy over the years (i. e., inflation).
a typical high-income household in 1980 earned $129,664. a similar household in 2009
earned $179,045. what was the relative increase in income for these households from 1980
to 2009? round to the nearest one percent.
i don't know
2 attempts
you answered 3 out of 5 correctly. asking up to 14.

, 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

2

step-by-step explanation:

answer is 270 degrees: -

to convert radians to degrees you multiply by 180/π

9π/ 6 * 180 / π

=   9 * 180 / 6

= 9 * 30

=   270 degrees   answer