BreBreDoeCCx
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 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

Which characteristic guarantees that a parallelogram is a rectangle?
9. What is the volume of the prisms shown below? 308 cu in 154 cu in 28 cu in 72 cu in
William Shakespeare is one of the most famous writers in the world. What is the verb?
What would james madison say about allowing a person elected to the house of representatives to serve at the same time on the supreme court? explain his thinkin
What would james madison say about allowing a person elected to the house of representatives to serve at the same time on the supreme court? explain his thinkin
What was the most famous sports competition in Ancient Greece
what are proportion?
what American literary classic was set in the French and Indian war?
What is the product of 7/10x5/6 written in simplest form? A.7/16 B.5/12 C.3/4 D.7/12
Under the Capetians, the french? a. regained territory from the English b. joined forces with the pope c. became part of the Holy Roman Empire d. united as