isabellagstclai isabellagstclai

02-05-2017
Mathematics

contestada

please help! this is for algebra 2. im not sure that im doing it correctly. thank you!

please help this is for algebra 2 im not sure that im doing it correctly thank you class=

Respuesta :

Аноним Аноним

02-05-2017

a) an = a1 + (n-1)d

so Sn = (n/2)[ a1 + ( a1 + (n-1)d)]
= (n/2) [ 2a1 + (n-1)d ]
= na1 + n(n-1)
-------- d
2

Answer Link

Otras preguntas

Plz help the question is the Photo

you run around a track in 60 seconds. what is your speed and velocity?

You have the power to make a difference, and that includes enhancing your personal health and the health of others. 1. explain the value of completing and monit

Perception is the psychological process in which sensory input is __________. A. detected and transduced by the sensory receptors B. organized and interpreted i

Urination is triggered by a complex sequence of events called the ___________ reflex.

Please help it's an easy equation but idk how to solve. 5x - 6 = 4x + 8 x = -14 x = -2 x = 2 x = 14

how did contractionist account for identical fossils being on the continents of south america and africa

According to the science of race, how many races are there? a. 30 races b. 1,740 specific races c. 4 major races d. since race is a socially constructed categor

Because of their role in the ecosystem, the Amazon Rainforest is sometimes called the

what information is included in an audience profile?