BreBreDoeCCx BreBreDoeCCx

04-03-2018
Mathematics

contestada

Find S10 for (-1) + (-7) + (-13) + (-19) +...

A.
250

B.
-280

C.
(-23)

D.
132

Respuesta :

Banabanana Banabanana

04-03-2018

[tex]a_1=-1 \\ a_2=-7 \\ \\ d=a_2-a_1=-7-(-1)=-6 \\ \\ \\ S_{10}= \cfrac{2(-1)+(10-1)(-6)}{2}\cdot10 = \cfrac{-2-54}{2}\cdot10 =\cfrac{-56}{2}\cdot10 =-280[/tex]

Your answer is B.-280

Answer Link

Otras preguntas

what is the most common type of vegetation throughout Latin America

how do i find the angles on a kite?

how to i do 7/16÷(31/2÷1/2)

Which body tissue or organ contains the most mitochondria?

the table shows the elevation of 6 cities in CaliforniaCity ElevationWestmorland

Why were the committees of correspondence powerful?

why is it critical to your cells to be near capillaries

_______ is the largest continental biome. It experiences long, cold winters; short, mild summers; and low precipitation. It is characterized by coniferous fore

Mrs.Henderson had 7/12dozen eggs in her refrigerator.Then she used 1/6 dozen eggs to make a cake.What fraction of a dozen is left?

Fossils are most commonly found in which type of rock?