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nikitadnepr [17]
3 years ago
10

PLEASE HELP!!!!!!!!!!!!!!!!

Mathematics
2 answers:
kakasveta [241]3 years ago
7 0
The answer is 9.
18+45=63
9(2+5)
9*2=18
9*5=45
18+45=63
TEA [102]3 years ago
3 0
<span>18 + 45 = __9_ ´ (2 + 5)

answer
9</span>
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An epidemic has hit Minecole City. Its population is declining 34% every hour. In just 3 hours, there are only 25,143 people lef
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The answer is 87,455

P(x) = P(0) * nˣ
P(x) - the final population after period x
P(0) - the initial population
n - the growth factor in decimal
x - period of time

x = 3 hours
P(3) = 25,143
P(0) = ?
n = 100- 34% = 66% = 0.66


P(x) = P(0) * nˣ
25,143 = P(0) * 0.66³
25,143 = P(0) * 0.287496
P(0) = 25,143 / 0.287496
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3 years ago
Which number is irrational?<br> A. 25<br> B. 0.636363...<br> C. 0.45<br> D. 6
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Answer:

B

Step-by-step explanation:

The "..." at the end of B tell us that it's a repeating decimal so B is irrational. Of course, you can't use this reasoning for every repeating decimal but in this case it works.

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The ages of Sylvana’s three daughters are consecutive even integers. The sum of their ages is 60. Write an equation that represe
lara [203]
X + (2 + x) + (4 + x) = 60

3x + 6 = 60 

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Solve the inequality 2 ways<br> Which is easier?
Amanda [17]
Hope this help to answer you question.

5 0
3 years ago
An English teacher needs to pick 1111 books to put on his reading list for the next school year. He has narrowed down his choice
forsale [732]

Answer:

There are 3,659,040 ways he can choose the books to put on the list.

Step-by-step explanation:

There are

12 novels

8 plays

12 nonfiction.

He wants to include

5 novels

4 plays

2 nonfiction

The order in which the novels, plays and nonfictions are chosen is not important. So we use the combinations formula to solve this problem.

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

How many ways can he choose the books to put on the list?

Novels:

5 from a set of 12. So

C_{12,5} = \frac{12!}{5!7!} = 792

Plays:

4 from a set of 8. So

C_{8,4} = \frac{8!}{4!4!} = 70

Nonfiction:

2 from a set of 12

C_{12,2} = \frac{12!}{2!10!} = 66

Total:

Multiplication of novels, plays and nonfiction.

T = 792*70*66 = 3,659,040

There are 3,659,040 ways he can choose the books to put on the list.

4 0
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