ekrucina93 ekrucina93

24-05-2018
Mathematics

contestada

How many terms are in the arithmetic sum 15 + 18 + 21 + … + 99?

n = 1,653

n = 28

n = 27

n = 29

Respuesta :

sqdancefan sqdancefan

24-05-2018

The n-th term is
a(n) = 15 + 3(n-1)
Then the last term corresponds to the value n that satisfies
99 = 15 +3(n -1)
33 = 5 +(n -1)
29 = n

The appropriate choice is ...
n = 29

Answer Link

Otras preguntas

what is the rate of change for f(x)=-2cos4x-3 on the interval from x=0 to x=pi over 4

x² – 3x – 2 over (x-3)(x - 2)(x - 1)express the following in partial fractions . ( with proper step pls )

Jonah had $340.87 in his checking account. He deposited $53 and wrote a check for $38.72. Find his new balance. -How did Jonahs balance change after he deposit

What are the discontinuity and zero of the function f(x) = quantity x squared plus 5 x plus 4 end quantity over quantity x plus 4? Discontinuity at (−4, −3), ze

Is the following true for all positive values of a and b: If a^2>b^2, then a>b

Help with this math homework please

I need to know what #5 is I’ve been stuck on it all night long

PLEASE HELP ASAP!!! Please give me examples to draw for corroboration

A ratio of laptops to tabelets in the stock room of a store is 13:17. If there are a total of 90 laptops and tabelets in the stock room, how many laptops are in

$12000 is compounded semiannually at a rate of 7% for 22 years. Find the total amount in the compound interest account