Eddie will enter high school next year. His older brother tells him that everybody in
high school plays a musical instrument.
Skeptical, Eddie decides to investigate.
Throughout the next month, he asks a
randomly selected sample of high-school
students whether they play an instrument.
The table at left shows what Eddie finds.
Rounded to the nearest percent, what
percentage of all 10th graders do not play
an instrument?

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9

, 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

$15.40 per mile

step-by-step explanation:

you have to round up to 4 because 6 is over 5 so you have to round the 3 up to 4