Question

please help

Answer 1

@TheSmartOne

Answer 2

Just work it out for one person, then multiply by 5 at the end.

0.25, 0.5, 0.75...

It's an arithmetic sequence, with a1 = 0.25, d=0.25, n=31. Plug them in:
\[\Large S_n =\frac{ n }{ 2 }[2a_1 + (n-1) d]\]
Don't forget to multiply the result by 5.

Answer 3

im getting 220 i dont think that is right

Answer 4

372?

Answer 5

Show work and i'll check it

Answer 6

its all written on paper not sure how to get it on here

Answer 7

s31=31/2(.50+(30).25

Answer 8

Looks about right.

Answer 9

is it 372?

Answer 10

Make sure to use parentheses correctly:

s31=31/2(.50+(30).25)

Answer 11

i keep getting 44 for that

Answer 12

You're not using your calculator correctly...

Type exactly this into google: 31/2*(.50+(30)*.25)

Answer 13

it doesnt show an answer

Answer 14

i typed that exactly in my calculator multiple times and get 44

Answer 15

Then you're doing something wrong:
https://www.google.com/search?q=31%2F2*(.50%2B(30)*.25)&rlz=1C1AOHY_enUS708US708&oq=31%2F2*(.50%2B(30)*.25)&aqs=chrome..69i57.416j0j1&sourceid=chrome&ie=UTF-8

Answer 16

OK so 620?

Answer 17

Yes.