Question

Each row in a window display of compact disk cartons contains two more boxes than the row above. The first row has one box.
Complete the table to find the number of rows in a display containing 144 boxes.

Row Number
1
2
3
4
5
6
Boxes in Row
1
3
5

Total boxes in Display

a.
12 rows
c.
18 rows
b.
10 rows
d.
15 rows

Answer 1

this is an arithmetic series with sum Sn=144 and common difference d= 2
u just need to find 'n' in
\(\huge S_n=n/2(2a+(n-1)d)\)

Answer 2

18 rows?

Answer 3

how did u get that ?

Answer 4

and no , not 18

Answer 5

idk i just guessed

Answer 6

lol

Answer 7

ugh just tell met the answer

Answer 8

this is not an answering site.

Answer 9

ughhhhhhhhhh

Answer 10

ohhh wait its 10 rows

Answer 11

u have the formula, u just put values and get the unknown variable........and stop guessing

Answer 12

its 10

Answer 13

what did the a in the formula represent?

Answer 14

a = first term =1

Answer 15

its 10!

Answer 16

forget it, im just gonna guess 12

Answer 17

if u put n=12 in that formula , u will get sum as144

Answer 18

oh so its 12

Answer 19

thanks

Answer 20

thanks goku guy