0909126031uyen 0909126031uyen

13-10-2021
Mathematics

contestada

the first term of an arithmetic sequence is 3000 and the tenth term is 1200. the sum of the first 20 terms of the sequence

Respuesta :

Holarjidey Holarjidey

13-10-2021

Step-by-step explanation:

B

1100

To find the sum of the first n terms of an arithmetic series use the formula,

S

n

=

2

n(a

1

+a

n

)

S

20

=

2

20(10+100)

S

20

=

2

2200

S

20

=1100

Answer Link

Otras preguntas

Find the ordered pairs for the x- and y-intercepts of the equation 5x − 6y = 30 and select the appropriate option below. a. The x-intercept is (6, 0), the y-int

Which sentence uses correct punctuation? a. My father advised me that, "Life is not always fair." b. My father advised me that "Life is not always fair." c.

a mountain bike is priced at 413 if the sales tax is 6.5 percent what is the cost to purchase the mountain bike round to the nearest cent if necessary

Which of the following expressions is a factor of the polynomial x ^ 2 +3/2 x - 1? a. x-1/2 b. x-2 c. x-1 d. x+3/2

probably the main reason africans rather than native americans became slaves in america was that

What an organism looks like, or other detectable characteristics, is its _______. a. genetic variable b. genotype c. phenotype d. allele

Which kind of tax is paid when purchasing consumer goods and services?

75% of 84 is what number

Which of the following is not a river in Africa? a. Niger b. Tigris c. Zambezi d. Congo

In centrally-planned economies, consumers have economic freedom and make many economic choices. true or flase