The value of x is B.4 I think
First term a1 = 6+5 = 11
second term = 12+5 = 17
common difference = 6
Sum of n terms:-
Sn = (n/2) [ 2a1 + d(n - 1)]
Sum of 30 terms:-
S30 = (30/2)[ 2*11 + 6(30-1)]
= 15 * ( 22 + 174)
= 15 * 196
= 2940 Answer
Answer:
I think it’s 819 because 819-718=121s
Step-by-step explanation:
Answer:
110 meter
Step-by-step explanation:

plz...
mark it as a brilliant answer