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

What can communities do to address the goals of Healthy People 2010?

what is 20/40 writen as a decimal

Which of these nations is least likely to guard the Gulf of Mexico? cuba, mexico, united states, canada

Mandy scored 88, 94, 82, and 89 on her math tests. What is the least score she can earn on her next math test to have a mean of 90 or more

If a Garner has 27 pansies and 36 daisies and he plants an equal number of each for type of flower in each row what is the greatest possible number of pansies i

if salinity increased at the poles,the water near the poles would?

Solve for the indicated variables: P=R-C; Solve for C

How can the carbon in animal wastes reach the atmosphere? A) Photosynthesis, organic carbon, underground storage. B) Decomposition, fossil fuel formation, fossi

my number has a tens digit that is more than the ones digit. zero is not one of my digits. what number am i

2. which of the following sentences is written in the passive voice? a.) charlie ran down the street. b.) the delicious bread is baked by mr. jillin.***********