in an ap, the first term of an arithmetic series is 5,the last term is 45 and the sum is 400. find the number of terms and common difference

Hi mate,

Step-by-step explanation:

Sn = n/2 (a+ l)

400 = n/2 ( 45 +5 )

400= N/ 2 (50)

400 = 25n

n =400/25 = 16

a n = a + ( n - 1 ) * d

45= 5 + (16-1) * d

45 = 5+ 15 d

40= 15 d

d = 40/ 15

=8/ 3

i HOPE IT IS CLEAR

PLS MARK ME AS THE BRAINLIEST

answer: sorry

step-by-step explanation: can you tell me pls how to find the rational of two integers

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4