Observe that as the series progresses, the term decreases by 1/4. To show this, observe the first four terms of the series below.
-200 = (1/4)(-800)
-50 = (1/4)(-200)
-12.5 = (1/4)(-50)
Since we have a common ratio, r, of 1/4, we can use the properties of a geometric series to find the 8th term of the series.
Recall that to find the sum of the nth term of a geometric series, we have

where a is the first term of the series and r is the ratio.
So, for the first eight terms, we have


Therefore, the sum of the 8th series is approximately -1066.65.
Answer: -1066.65
Ok, so If you are asking for the original amount it would be a total of 250 cm worth of ribbon.
3/4 is equal to .75 so you multiply 9 by .75 to get the remaining fourth. 9 times .75 is 3 add 3 to 9 to get the whole amount of flour. 3+9= 12. Molly needs 12 cups of flour to make the bread.
Answer:
x is 9
Step-by-step explanation:
since they are vertical angles, they are congruent. We make an equation putting each one behind the equal sign (7x+3=10x-24) and we solve.