BreBreDoeCCx BreBreDoeCCx

04-03-2018
Mathematics

contestada

Find S25 for (-7) + (-2) + 3 + 8 +...

A.
1,320

B.
1,325

C.
825

D.
820

Respuesta :

Banabanana Banabanana

04-03-2018

[tex]a_1=-7 \\ a_2=-2 \\ \\ d=a_2-a_1=-2-(-7)=5 \\ \\ \\ S_{25}= \cfrac{2(-7)+(25-1)5}{2}\cdot25 = \cfrac{-14+120}{2}\cdot25 =\cfrac{106}{2}\cdot25 =1325[/tex]

Your answer is B. 1325

Answer Link

Otras preguntas

Despite growing numbers, minority groups in the US continue to face

Identify the oblique asymptote of f(x) = quantity x squared minus 4 x plus 8 over quantity x plus 2. y = 0 y = x - 2 y = x - 6 No oblique asymptote

America changes through times of conflict, growth, or peace and cooperation?

How did the actions of Daniel Shays and his followers relate to the economic problem of the Confederation period? What was the significance of the movement he l

Describe a real world situation that can be modeled by the equation y = 1/20x. be sure to describe what each variable represents.

What was the structure of authority within the new factories in the industrial revolution?

Why did the Spanish explore and colonize New Mexico and Florida in the 1600s?

People flocked to California to fulfill the _________.

Which primary source document would give you insight into how the Great Chicago Fire affected working-class families?

Under the constitution the principle of federalism is the reason that power and responsibility are