PLS HELP ASAP What is the positive number that is 7 times its rightmost digit?????

Mathematics

1 answer:

SSSSS [86.1K]3 years ago

7 0

Answer:

Step-by-step explanation:

Uh-

7 is 7 times more than 1

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What is the measure of an interior angle in a regular octagon?

andrew11 [14]

To find the interior angle of any regular polygon you can use the formula $\frac{(n-2)*180}{n}$ where n is the number of sides
So, $\frac{(8-2)*180}{8} =135$
The measure of an interior angle in a regular octagon is 135

5 0

2 years ago

Please solve the problem with steps

Debora [2.8K]

Answer:

Infinite series equals 4/5

Step-by-step explanation:

Notice that the series can be written as a combination of two geometric series, that can be found independently:

$\frac{3^{n-1}-1}{6^{n-1}} =\frac{3^{n-1}}{6^{n-1}} -\frac{1}{6^{n-1}} =(\frac{1}{2})^{n-1} -\frac{1}{6^{n-1}}$

The first one: $(\frac{1}{2})^{n-1}$ is a geometric sequence of first term ( $a_1$ ) "1" and common ratio (r) " $\frac{1}{2}$ ", so since the common ratio is smaller than one, we can find an answer for the infinite addition of its terms, given by: $Infinite\,Sum=\frac{a_1}{1-r} = \frac{1}{1-\frac{1}{2} } =\frac{1}{\frac{1}{2} } =2$

The second one: $\frac{1}{6^{n-1}}$ is a geometric sequence of first term "1", and common ratio (r) " $\frac{1}{6}$ ". Again, since the common ratio is smaller than one, we can find its infinite sum: