Answer:
6,138
Step-by-step explanation:
Given the following:
Vocalist needed :
First day (a) = 6
For subsequent days : number doubles
Using the relation. :
Sn = a(r^n -1)/(r -1)
Where a = first term = 6
r = common ratio = r3/r2 = r4/r3
Since number doubles after each consecutive day, then ; r = 2, n = 10
Sn = 6(2^10 -1)/(2 -1)
Sn = 6(1024 - 1) / 1
Sn = 6144 - 6
Sn = 6138
No because the last one is not correct and if you want to text me back if you won't me to do it for you for the first three you can
Okay soo you got 9•2 it equals to 18 then divide 18 by 4 & that will give you 4.5
Answer:

Step-by-step explanation:
The angles of a triangle add to 180, add the angles and solve for x