216 ? Maybe . I think you have to multiply 81 times .375 you move the decimal two places over . I believe that’s how you do the problem
Studio = 7 yards by 4 yards
Area = 7*4 = 28 square yards.
Area of square carpet = 1 yard * 1 yard = 1 square yard
Number needed = Area of studio / Area of square carpet = 28 / 1 = 28
Number needed = 28
Answer:
8a+5b-9
Step-by-step explanation:
(8a+2b-4)+(3b-5)
8a+2b+3b-4-5
8a+5b-9
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
![S_{n} = a(\frac{1-r^{n}}{1-r})](https://tex.z-dn.net/?f=%20S_%7Bn%7D%20%3D%20a%28%5Cfrac%7B1-r%5E%7Bn%7D%7D%7B1-r%7D%29%20)
where a is the first term of the series and r is the ratio.
So, for the first eight terms, we have
![S_{8} = -800(\frac{1-(\frac{1}{4})^8}{1- \frac{1}{4}})](https://tex.z-dn.net/?f=%20S_%7B8%7D%20%3D%20-800%28%5Cfrac%7B1-%28%5Cfrac%7B1%7D%7B4%7D%29%5E8%7D%7B1-%20%5Cfrac%7B1%7D%7B4%7D%7D%29%20)
![S_{8} \approx -1066.65](https://tex.z-dn.net/?f=%20S_%7B8%7D%20%5Capprox%20-1066.65%20)
Therefore, the sum of the 8th series is approximately -1066.65.
Answer: -1066.65
1.) 14320
2.) 32041
3.) 02413
4.) 30214
5.) 40321
6.) 21340
7.) 40132
8.) 12430
9.) 31240
10.) 21430
11.) 40312
12.) 04312
13.) 02130
14.) 34321
15.) 41203
16.) 30124
17.) 24310
18.) 33412
19.) 02143
20.) 43102
I hope you can find more