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4 years ago

What is 16=2n-2(3n 4)?

Mathematics

1 answer:

seraphim [82]4 years ago

4 0

Wasnt sure if it was 3n plus or minus 4, but i hope this helps .

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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

After plotting the data where x represents the length of the side of a polygon, and f(x) represents the area of the polygon, Jac

garri49 [273]

Answer:

C. 19

Step-by-step explanation:

$f(x) = x {}^{2} + 3x + 1 \\ f(3) = 3 {}^{2} + 3(3) + 1 \\ = 19$

7 0

3 years ago

2r^6+11r^3-13 help me please!!!!!

kvasek [131]

Answer: (r-1)(r^2+r+1)(2r^3+13)

7 0

3 years ago

9th grade math help me understand please 20 points

Andrej [43]

Answer:

Lines 1 and 4 are parallel

Step-by-step explanation:

The image below shows the four lines graphed, and proves that lines 1 and 4 are parallel.

Hope this helps! :)

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3 years ago

Is (-1, -4) a solution to a equation y=6x_ -2?

Stolb23 [73]

The answer is no shbajahwje

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3 years ago