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Andru [333]
3 years ago
12

Find the number of subsets of the set {1, 2, 3, ..., 9}

Mathematics
1 answer:
Irina18 [472]3 years ago
6 0

Answer:

512

Step-by-step explanation:

the number of subsets of the set {1, 2, 3, ..., 9} is : 2^9 = 512

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Find the image of (3,8) after<br> a reflection over the origin.
Oksana_A [137]

Answer:

(-3, -8) I think

Step-by-step explanation

over the origin mean it would be going diagonally across (0,0). Not directly down (over the x-axis/ across the y-axis), nor to the side (over y-axis/ across the x-axis

3 0
3 years ago
2.6 Puzzle time how can you make sure to start a fire with two sticks?
enyata [817]

Answer:

"Make sure one of them is a match"

Step-by-step explanation:

It takes a little practice and above all to generate heat through friction. By raising the temperature of the woods, it is possible to reach the ignition temperature through friction.

Fires require good equipment and good technique. The majority of times it fails is due to a lack of technique and equipment. This can make learning difficult.

For wood selections, you generally want to comply with the following:

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Make the friction forming a 90 degree angle between them, like a cross. Keep one of the sticks supported on the floor vertically, and the other horizontally rubbing it against it at rapid speed, at intervals.

Under this wood put dry tinder that is able to ignite quickly once you generate the fire.

And for the Puzzle remember the orden of the words:

<h2>Make sure one of them is a match. </h2>

Use tree wood, rub and heat until ignition is generated.

5 0
3 years ago
Seven tenths of what number is 9.1
8090 [49]
.70 * x = 9.1
.70/.70 * x = 9.1/.70
x = 13
7 0
3 years ago
A rectangle has a side length of (x+2) meters and a width of (2x+3) meters.
Kaylis [27]

Step-by-step explanation:

area=length x width

91=(x+2)(2x+3)

91=x^2+5x+6

x^2+5x-85=0

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7 0
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b. Find and interpret the standard deviation of the number of floors in this data set. Select the correct choice below and fill
Nat2105 [25]

Answer:

Option B. The standard deviation of the number of floors per city is nothing.

Step-by-step explanation:

The standard deviation of a data set is the statistic that measures the deviance or dispersion of the data from the relative mean. In other words, it is is a measure of how spread the numbers are. The standard deviation is given by the following formula:

\sigma = \sqrt{\frac{1}{N}(x-\mu) ^{2}  }

In this case, it is the deviation of the number of floors in the building in the city.

7 0
3 years ago
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