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3 years ago

Marcus ran a 200-meter race in 25 seconds. What is his speed in meters per second?

Mathematics

2 answers:

Oksi-84 [34.3K]3 years ago

3 0

Answer:

200/25 = 8 meters

Step-by-step explanation:

Just take the distance of 200 m and divide it by 25 seconds.

timofeeve [1]3 years ago

3 0

It’s 8 just divide the numbers and that’s what you’ll get

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Answer:

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3 years ago

Write 27/40 as a decimal.

Alecsey [184]

Answer:

0.675

Step-by-step explanation:

27/40

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- Multiply each number by 25

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2 years ago

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23. What is the equation of the line that contains the points (2, 1) and (-1, -8)?

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I'm guessing this is a slope problem, so the equation would be like this: y = mx + b where m is the slope and b is the y-intercept.

$m = \frac{y1 - y2}{x1 - x2}$
Using this,
$m = \frac{1 + 8}{2 + 1} = \frac{9}{3}$
Which is equal to,
$m = 3$

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3 years ago

An English teacher needs to pick 9 books to put on his reading list for the next school year, and he needs to plan the order in

Nikitich [7]

Answer: $4.37\times10^3$

Step-by-step explanation:

Given : Number of choices for novels = 4

Number of choices for plays = 6

Number of choices for poetry books = 5

Number of choices for nonfiction books = 5

Total books =4+6+5+5=20

If he wants to include all 4 novels, then the number of books left to select = 9-4=5

Remaining choices for books = 20-4=16

Number of combinations of n things taking r at a time : $\dfrac{n!}{r!(n-r)!}$

Then, the number of different reading schedules are possible :_

$^4C_4\times^{16}C_5\\\\=\dfrac{4!}{4!(4-4)!}\times\dfrac{16!}{5!(16-5)!}\\\\=(1)\times\dfrac{16\times15\times14\times13\times12\times11!}{120\times11!}\\\\=4368=4.368\times10^3\approx4.37\times10^3$

Hence, the required answer is $4.37\times10^3$ .

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3 years ago