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2 years ago

Help???????????????????????

Mathematics

2 answers:

ElenaW [278]2 years ago

5 0

Answer: 3(2)*2+15/3 = 23

denis-greek [22]2 years ago

5 0

Answer:

Step-by-step explanation:

3^2 x 2 + 15 : 3

9 x 2 + 5

18 + 5 = 23

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3 years ago

Many fundraisers ask for donations using email and text messages. A paper describes an experiment to investigate whether the pro

blagie [28]

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b. donations using text message

d. donations using email

Step-by-step explanation:

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2 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