Answer:
The answer to this problem is 6.
Step-by-step explanation:
Because 17 - 14 = 14 - 11 = 3, the ratio of the arithmetic series is 3;
Then, A4 = 8 - 3 = 5; A3 = 5 - 3 = 2; A2 = 2 - 3 = -1; A1 = -1 - 3 = -4.
But 68 = A1 + ( n- 1 ) x r;
68 = -4 + ( n - 1) x 3;
( n - 1 ) x 3 = 72;
n - 1 = 24;
n = 25;
Finally, Sn = ( A1 + An) x n / 2; then, S25 = ( - 4 + 68) x 25/2;
S25 = 64 x 25 / 2;
S25 = 32 x 25;
S25 = 800;
The value of sum is 800.
4(2m-1)=16
8m-4=16
8m=20
m=20/8
=2.5
Hope this helps. Just ask if you need a better explanation.
(total bill)*(percent of bill)=(money paid for that part of bill)
total bill=$132.00
electric %= 0.58 (1-.42)
gas %= 0.42
132*.42=55.44
132*.58=76.56
The Millers paid $55.44 for their gas bill. The Millers paid $76.56 for their electric.
**you can check this because $76.56+$55.44=$132
