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OleMash [197]
2 years ago
10

PLEASE HELPPPP. I really need it

Mathematics
1 answer:
GalinKa [24]2 years ago
5 0

Answer:

Option 4: (0, 5]

Step-by-step explanation:

Given the <u>inequality notation</u>, 0 < <em>x</em> ≤ 5 :

<h2><u>Definitions:</u></h2><h3>open- and closed-parenthesis "(  )"</h3>

We know that using the <u>open- and closed-parenthesis</u>, "(  )" are used to express interval notation for which the endpoints are <em><u>not</u></em> included as part of the solution.  Hence, the open- and closed-parenthesis are associated with the inequality symbols, <em>less than </em>(>) or greater than (<), as you do not include the endpoints when these inequality symbols are used.

<h3>open- and closed-brackets "[     ]"</h3>

In contrast, the <u>open- and closed-brackets</u>, "[     ]" are used to express interval notation for which the endpoints <u><em>are</em></u> included as part of the solution.  Hence, the open- and closed-parenthesis are associated with the inequality symbols, <em>less than or equal to </em>(≤), and <em>greater than</em><em> </em><em>or equal to</em> (≥).

<h2><u>Explanation:</u></h2>

In the inequality notation, 0 < <em>x</em> ≤ 5, the endpoints are 0 and 5.  

The inequality symbol <u>between 0 and x</u> is "<," which means that we must use an open parenthesis, " ( " for the endpoint, 0.

While the inequality symbol <u>between x and 5</u> is "≤," which means that we must use an closed bracket, " ] " for the endpoint, 5.

Therefore, the correct answer is Option 4: (0, 5].

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Answer:

Every week, the radioactivity decreases by a factor of 5

After 1 week, it goes from 5,000 to 1,000

2 weeks  1,000 / 5 =200

3 weeks 200 / 5 = 40

4 weeks 40 / 5 = 8

5 weeks 8 / 5 = 1.6

6 weeks 1.6 / 5 = 0.064

7 weeks 0.064 / 5 = 0.0128

8 weeks .0128 / 5 = 0.00256

9 weeks 0.00256 / 5 = 0.000512

10 weeks 0.000512 / 5 = 0.0001024

Step-by-step explanation:

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2 years ago
At a wedding reception an equal number of guests were seated at each of three large tables, and 7 late arriving desks were seate
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Answer:

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Step-by-step explanation:

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answer is 10

8 0
2 years ago
Two blocks of wood are shaped as right rectangular prisms. The smaller block has a length of 9 cm, a width of 3 cm, and a height
solmaris [256]
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3 0
3 years ago
Read 2 more answers
Which ordered pair is a solution to the system of equations?
iren2701 [21]

(- 2, - 3) is a solution to the given system of equations.

Answer: Option D

<u>Step-by-step explanation:</u>

Given equation are not presented in proper format. So, let assume the given system of are as below,

         2 x - y = -1

         2 x -4 y = 8

Now, subtract the second equation from the first, we get

          (2 x - y) -(2 x - 4 y) = -1 -8

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           y = -3 (obtained this when divide by 3)

Substituting y = - 3 into the first equation, we get

          2 x - (-3) = - 1

          2 x = - 1 + 3

          x = - 2 (obtained when divide by 2)

Now, the answer is (x, y) = (- 2, - 3)

3 0
3 years ago
What is the measure of an exterior angle of a regular 7-sided polygon? The answer must be a decimal.
ale4655 [162]
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= 180-128.57
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8 0
3 years ago
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