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3 years ago

14

You and your friends are picking up videos at a video store. You have selected 7 videos but will only have time to watch 3. How

many different ways can you select 3 videos to watch?

1 answer:

spin [16.1K]3 years ago

3 0

There are 21 different ways

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juin [17]

Answer:

the Rule of 72 is also used to determine how long it takes for money to halve in value for a given rate of inflation

Step-by-step explanation:

sorry idk other question

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3 years ago

Amiraneli [1.4K]

Answer:

volume of a cone = 1/3*(πr²h)

Step-by-step explanation:

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2 years ago

The second term in a geometric series is 10, and the seventh term is 10,240. Find the sum of the first six terms.

just olya [345]

Answer:

The sum of the first 6 terms is 3,412.5.

Step-by-step explanation:

The second term of the geometric series is given by:

$a_{2}=a_{1}*r$

Where a1 is the first term and r is the common ratio. The seventh term can be written as a function of the second term as follows:

$a_{7}=a_{1}*r^{6} \\a_{7}=a_{2}*r^{5} \\10,240 = 10*r^{5}\\r=\sqrt[5]{1024} \\r = 4$

The sum of "n" terms of a geometric series is given by:

$a_{1} = \frac{10}{4} = 2.5\\S_{n}=a_{1}(\frac{r^{n}-1 }{r-1})\\S_{6}=2.5(\frac{4^{6}-1 }{4-1})\\S_{6}=3,412.5$

The sum of the first 6 terms is 3,412.5.

5 0

3 years ago

What is the value of 2x to the third power+4x to the second power 3x to the second power-6x when x=3?

jek_recluse [69]

Hi! So to solve for these, all you have to do is keep PEDMAS in mind. For example, for 2x^3 (Just a fancy way of writing "to the third power") first plug in 3: 2(3)^3 and take it to the third power because E (exponent) comes before M (multiplication) in PEDMAS. You should get 2(27) which then equals 54. Hope this helps:)

4 0

3 years ago

Where's a numerator found?

Sonja [21]

In a fraction the numerator is the top of the fraction.

$\sf\frac{numerator}{denominator}$

4 0

3 years ago

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