A store displays six computers on a shelf side–by–side. If the first computer is seven inches wide and each successive computer is two inches wider than the previous one, find the total width of the computers on the shelf.

Part 1: Describe the sigma notation used in answering the question above. (2 points)

Part 2: Show all your work and answer the question. (3 points)

Question

A store displays six computers on a shelf side–by–side. If the first computer is seven inches wide and each successive computer is two inches wider than the previous one, find the total width of the computers on the shelf. 

Part 1: Describe the sigma notation used in answering the question above. (2 points) 

Part 2: Show all your work and answer the question. (3 points)

anonymous · Answer

so how do i solve that?

ghazi · Answer

just put n=1 for 2 computers or as your question says you have 6 computers put n=5 you'll have width = 7+2*5=17

ghazi · Answer

no wait

anonymous · Answer

dont i have to use that symbol at some point..?

ghazi · Answer

it will have series of 7*n+2*x where n=number of computers and x= n-1

anonymous · Answer

i am sorry i dont know how to slove that can you solve it for me?

ghazi · Answer

put n=6 and x=5 your total width will be 
= 7*6+2*5= 42+10=52 inches

anonymous · Answer

thank you!!!!

ghazi · Answer

:)