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vitfil [10]
3 years ago
9

Please help math 30 points

Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
3 0

Because the inequality sign is less than, the shaded region would be blow the line.

Because the inequality sign is also equal to ( ≤ means less than or equal to) the boundary line would be solid.


The answer is: The region shaded below a solid boundary line.

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Elena randomly chooses a number from 1 to 10. What is the probability she chooses a number greater than 5?
zepelin [54]

ANSWER

P(E)=\frac{1}{2}

EXPLANATION

From the given information, Elena chooses a number from 1 to 10.

The sample space is

S={1,2,3,4,5,6,7,8,9,10}

n(S)=10

The numbers greater than 5 are:

E={6,7,8,9,10}

n(E)=5

The probability that, she chooses a number greater than 5 is:

P(E) =  \frac{n(E)}{n(S)}

Substitute the values,

P(E) =  \frac{5}{10}

P(E) =  \frac{1}{2}

5 0
3 years ago
The population of a city is 100,000. It doubles each decade for 5 decades.
RoseWind [281]

Answer:

1000000

Step-by-step explanation:

4 0
3 years ago
Which macaw has a mass closest to 1 kilogram?
Nataliya [291]

Answer:

green winged

Step-by-step explanation:

coz 1 kg = 1000g

and 900 is closer to 1000

7 0
3 years ago
Read 2 more answers
If the ratio of radius of two spheres is 4:7, the ratio of their volume is?​
Kazeer [188]

Answer:

64 : 343

Step-by-step explanation:

First use the radii to find the volume

1) Radius of first sphere is 4 (taken from 4:7 ratio)

   Insert it into the equation for volume of a sphere: V=4 /3πr^3

   V = (4/3)(π)(4^3)

   V = (4/3)(π)(64)

   V = 256/3 π

   Volume of the first sphere = 256/3 π

2) Radius of the second sphere is 7 (also taken from 4:7 ratio)

   Insert it into the equation for volume of a sphere: V=4 /3πr^3

   V = (4/3)(π)(7^3)

   V = (4/3)(π)(343)

   V = 1372/3 π

   Volume of the second sphere = 1372/3 π

Next, calculate the ratio by dividing the two numbers

256/3 π ÷ 1372/3 π

Answer should be 64 : 343

The simple way to do this problem is to just cube the numbers:  

4:7 becomes 4^3 : 7^3 = 64 : 343

Either way works.

6 0
4 years ago
If DE is congruent to KR and O is the midpoint of ER and DK, which of the following congruence postulates can be used
Deffense [45]

Answer:

ASA

Step-by-step explanation: I'm not sure I had just found a key.

6 0
3 years ago
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