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leonid [27]
2 years ago
5

Why does the fact family for 81 and 9 have only two number sentences

Mathematics
2 answers:
Julli [10]2 years ago
8 0
It only has two number sentences because 81 divided by anything else wont work only 9 would. Also since 9 times 9 is equal to 81
Phoenix [80]2 years ago
5 0
<span>Because there are only two things you can do with these two "family" members. 81 divided by 9 is 9. 9 times 9 is 81. Strictly speaking, there should be three in the family: 9, 9, and 81 9 is the square root of 81. 81 is 9 squared.</span>
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A point is randomly chosen on a map of North America. Describe the probability of the point being in each location: North Americ
Aleks04 [339]

Answer:

We know that the map is of North America:

The probabilities are:

1) North America:

As the map is a map of North America, you can point at any part of the map and you will be pointing at North America, so the probability is p = 1

or 100% in percentage form.

2) New York City.

Here we can think this as:

The map of North America is an extension of area, and New Yorck City has a given area.

As larger is the area of the city, more probable to being randomly choosen, so to find the exact probability we need to find the quotient between the area of New York City and the total area of North America:

New York City = 730km^2

North America = 24,709,000 km^2

So the probability of randomly pointing at New York City is:

P = ( 730km^2)/(24,709,000 km^2) = 3x10^-5 or 0.003%

3) Europe:

As this is a map of Noth America, you can not randomly point at Europe in it (Europe is other continent).

So the probaility is 0 or 0%.

5 0
3 years ago
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julia-pushkina [17]

Answer:

Step-by-step explanation:

8z (3x^2 +y)

5 0
3 years ago
Plz help me with this
Sergio [31]

9514 1404 393

Answer:

  d)  -4 ≤ x ≤ 1.5

Step-by-step explanation:

The domain is the horizontal extent of the graph. Here, it goes from about x=-4 to about x = 1.5.

There are solid dots on both ends of the line segment, so the inequality will use ≤ for both limits. The domain is ...

  -4 ≤ x ≤ 1.5

6 0
2 years ago
Which are similar to triangle JKL? Label each yes or no
motikmotik

Answer:

1st one is yes

Step-by-step explanation:

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kotegsom [21]

Answer:

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Step-by-step explanation:

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5 0
3 years ago
Read 2 more answers
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