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gayaneshka [121]
4 years ago
8

Is R-Z(Real numbers - integers) an open topology?

Mathematics
1 answer:
cestrela7 [59]4 years ago
5 0
<span>R−Z</span><span> is a union of countable many open sets so </span><span><span>R−Z</span><span>R−Z</span></span><span> is open
I actually didn't know that I had to look it up and got my answer from another site, oppsie doopsies
</span><span>
</span>

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How do you solve: 81 X 9^(-2b-2)=27
Dominik [7]

Did you mean

81* 9∧(-2b-2)=27 => First divide whole equation with 81 and get

(3∧2)∧(-2b-2)=1/3 => 3∧(-4b-4)=3∧(-1) => -4b-4=-1 => -4b= -1+4 => -4b=3 =>

we will multiply whole equation with (-1) and get 4b=-3 => b=-(3/4)

If the start item is correct.

Good luck!!!



5 0
3 years ago
Read 2 more answers
Water makes up about 60% of the average adult's body weight. Represent this percent by shading in the squares.
Viefleur [7K]

Answer:

shading three boxes

Step-by-step explanation:

It is given that :

The body weight of an average adult = 60%

We have to show this by shading the square boxes shown.

There are 5 square boxes in total which makes up 100%.

So divide 100 by 5, we can 20% for each box.

So, 20% + 20% + 20%  will give us 60%

Therefore, shading three boxes will give us 60% which is the water percent in an average adult's body weight.

This is represented by the figure below.

5 0
3 years ago
Help please idk how to do it and plz show work
exis [7]
Ok well first of all let's calculate how many cartons there are of each size:

There are 264 cartons in total and 1/6 of these are small, 2/3 are medium and the rest are large, thus:
Number of small cartons = (1/6)*264 = 44
Number of medium cartons = (2/3)*264 = 176
Number of large cartons = 264 - (44 + 176)
= 264 - 220
= 44

Now we can calculate how many eggs are needed to fill each type of carton:

Each small carton holds 8 eggs, thus the number of eggs needed equals:
8*44 = 352 eggs
Each medium carton holds 12 eggs, thus the number of eggs needed equals:
12*176 = 2112 eggs
Each large carton holds 18 eggs, thus the number of eggs needed equals:
18*44 = 792 eggs

Thus the total number of eggs needed = 352 + 2112 + 792 = 3256
7 0
3 years ago
Choose the inequality that represents the following graph. It's On khan academy
ad-work [718]

Answer:

d

Step-by-step explanation:

3 0
3 years ago
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Which expression can be expanded using the binomial theorem?
kirill [66]

Answer:

The third choice:  (x² - 1)³

Step-by-step explanation:

That is the only expression that is a binomial.  Binomial means "two numbers".  For this expression, x² is one number, and -1 is the other.  Choice 1 is a monomial (one number) and choices 2 and 4 are trinomials (three numbers)

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