Answer:
5461
Step-by-step explanation:
You can recognize this as the sum of 7 terms of a geometric series with first term 1 and common ratio 4.
That sum is given by ...
where a1 is the first term and r is the common ratio.
Filling in the numbers, we have ...
The sum is 5461.
Answer:
x =27
Step-by-step explanation:
3x - 4y=65
lets substitute the value of y in the equation:
3x -4(4) =65
3x = 65 +16
3x= 81
x= 81/3
x = 27
Answer: 440
Step-by-step explanation:
220/400 = 55%
100%- 55% = 45%
there were 45% more girls than there were boys.
You would want to divide 216 by 18 and by doing that you would get 12.
