Question

please help

Answer 1

If they are moving up by 0.5 then times 25 by 0.5 and see if you can get the right answer.

Answer 2

this is an arithmetic series with common difference = 1/2

Answer 3

what does the S mean

Answer 4

the sum:- S25 = the sum of 25 terms

Answer 5

so is their a formula

Answer 6

yes for an AS

Sn = (n/2)[2a + d(n-1)]

where n = number of terms , d = common difference and a = first term.
so for your question n = 25 , a = 1/2 and d = 1/2

Answer 7

just plug those values into the formula and work it out

Answer 8

okay thanks man

Answer 9

yw

Answer 10

162.5?

Answer 11

12.5 [2*0.5 + 0.5(25-1)]
= 12.5 * 13
= 162.5

Answer 12

yep