ImmortalFusedZamasu ImmortalFusedZamasu

02-07-2018
Mathematics

contestada

Please Help??

What is the sum of the last four terms of the series 7 + 9 + 11 + ..... + 21?

A. 72

B. 40

C. 112

Respuesta :

jdoe0001 jdoe0001

02-07-2018

well, if you notice, is just an arithmetic sequence, is adding 2 to get the next term.

so the last term is 21, so the one before that has to be 21-2 or 19, and the one before that 17 and the one before that 15.

15+17+19+21.

Answer Link

Otras preguntas

Randall opened a lemonade stand. He spent $3.50 on lemons, water, and sugar. He spent another $2.00 on cups. Randall sold 15 cups of lemonade for $0.50 each. Wh

2-6 on easy questions on earthquakes please help me out

is the government doing enough to ensure that human rights are protected

PLZZZ HEELP DUE TMR! 40 POINTS! I WILL ALSO GIVE BRAINLIEST! And ur getting reported if the answer is not applicable! Outline the events of a jousting competiti

Mrs. Craig gave her class 15 minutes to read. Abby reads 5.5 pages in that time. At what rate, in pages per hour, would Abby read?

Why has it been difficult to decrease the gap in life expectancy between developing and developed countries? Life expectancy has increased at similar rates. The

How is Zoe able to get a new set built? Zoe asks the drama club for blocks of stone from last year's play. Zoe uses creativity and everyday materials. Zoe uses

Factorise: x³ + 32x + 20.

please urgent please beg

HELP ME PLAESE ASAP PLAESE TELL ME HOW YOU SOLVED ITT