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3 years ago

Which two ratios form a proportion?

Mathematics

2 answers:

Nuetrik [128]3 years ago

8 0

Answer:

Step-by-step explanation:

You basically have to divide each of the fractions. And when you do, the answer is D because 15 divided 5 =3 and 12 divided by 4 = 3. Both ratios are a proportion because they are equal.

algol133 years ago

7 0

Answer:

D. 15/12 and 5/4

Step-by-step explanation:

15/5=3

12/4=3

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A Geometric series has a first term of 4 and a common ratio of 6. what formula is equivalent to the partial sum of the first n t

IRISSAK [1]

$\bf \qquad \qquad \textit{sum of a finite geometric sequence}
\\\\
S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
a_1=4\\
r=6
\end{cases}
\\\\\\
S_n=4\left( \cfrac{1-6^n}{1-6} \right)\implies S_n=4\left( \cfrac{1-6^n}{-5} \right)$

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3 years ago

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2 years ago

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iogann1982 [59]

Answer:

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3 years ago

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nikklg [1K]

Answer:

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Step-by-step explanation:

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3 years ago

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swat32

Answer:

it 2 parts away

Step-by-step explanation:

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3 years ago

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