English: Do you mean = “Someone help me please” ?
Español: Con qué necestias ayuda?
Answer:
1st number: 3
2nd number: 18
3rd number: 19
Step-by-step explanation:
let 'f' = 1st number
let '6f' = 2nd number
let '6f + 1' = 3rd number
f - 2(6f + 1) = -35
f - 12f - 2 = -35
-11f - 2 = -35
-11f = -33
f = 3
Answer:
-41
Step-by-step explanation:
arithmetic sequence formula:
where an = nth term , a1 = first term, n = # of terms and d = common difference
we want to find the 21st terms
The first term is -1 so a1 = -1
The number of terms is 21 so n = 21
and the common difference appears to be -2 because as the sequence goes on the number previous to it is subtracted by 2. eg. to get to -3 from -1 we subtract 2 ( -1 - 2 = -3) so d = -2
to find the 21st term we plug in the values of the variables
an = a1 + (n-1)d
a1 = -1 , n = 21 and d = -2
an = -1 + (21-1)(-2)
subtract 1 from 21
an = -1 + (20)(-2)
multiply -2 and 20
an = -1 + -40
add -1 and -40
an = -41
the 21st term would be -41