Can someone give all the answers to this? (Please)

Mathematics

2 answers:

Lena [83]3 years ago

7 0

No, the top one would be 33. You're adding the brick next to another brick together for example; 3 and 4 are together; makes 7. 4 and 5 are together makes 9. 5 and 3 are together makes 8.

2. That's unit rate; You have to divide 225 by 15 which gives you 15. 15 x 15 = 225 so, 15 x ( 1 hour ) = 15 hours.

6. Y = 34. 98 + 4 = 102. 102 divided by 3 = 34. 102 - 4 = 98.

That's all I can do sorry

nignag [31]3 years ago

6 0

Top one would be 18 on the pyramid.

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Determine the sum of the first 9 terms in the geometric series where r= -0.25 and a1= 256.

Damm [24]

$\bf \qquad \qquad \textit{sum of a finite geometric sequence} \\\\ S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad \begin{cases} n=n^{th}\ term\\ a_1=\textit{first term's value}\\ r=\textit{common ratio}\\ ----------\\ r=-0.25\\ a_1=256\\ n=9 \end{cases}$

$\bf S_9=256\left(\cfrac{1-(-0.25)^9}{1-(-0.25)} \right)\implies S_9=256\left( \cfrac{1+0.25^9}{1+0.25} \right) \\\\\\ S_9=256\left( \cfrac{52429}{65536}\right)\implies S_9=\cfrac{52429}{256}\implies S_9=204.80078125$

4 0

2 years ago

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I Need Help With Statistics

Ilya [14]

Answer: Choice A) mean, there are no outliers

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