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Mariana [72]
3 years ago
7

How do you round 23 to the nearest thousand?​

Mathematics
1 answer:
Zielflug [23.3K]3 years ago
6 0

You cannot round 23 to the nearest thousand.

There are only TWO PLACE VALUES in 23: ones and tens.

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Help me with this question
Lisa [10]

Answer:

The answer is y=-x+9.

The first thing to do is find where the line intercepts the y-axis, which is at positive 9 so you'll add a +9 to the end of your equation. Next you find the slope and since it's going down left to right, you know it is a negative. Now slope is found by change in y divided by change in x. And since both change and y and change in x are both 1, 1/1 is 1. And since you know it's negative that means the slope is -x. Altogether you get y= -x+9

8 0
2 years ago
X + 3 =8<br> X- 5 =7 <br> Please someone help?
Sav [38]

Step-by-step explanation:

x+3=8

8-5=3 so x=5

7+5=12 / 12-7=5

12-5=7

8 0
3 years ago
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The average number of mosquitoes in a stagnant pond is 80 per square meter with a standard deviation of 12. If 36 square meters
svp [43]

Answer:

a) 18.4%

Step-by-step explanation:

Assuming a normal distribution, the z-score (z) for the probability of the average of the mosquitoes count being 'X'  is given by:

z(X)=\frac{X-\mu }{\frac{\sigma}{\sqrt{n}}}

Where 'μ' is the distribution mean, 'σ' is the standard deviation and 'n' is the number of square meters chosen.

For X = 81.8 and n=36:

z(X)=\frac{81.8 - 80}{\frac{12}{\sqrt{36}}}\\z(X)= 0.9

A z-score of 0.9 is equivalent to the 81.59 th percentile in a normal distribution.

Therefore, the probability (P) that the average of those counts is more than 81.8 mosquitoes per square meter is:

P= 100\% - 81.59\%\\P=18.41\%

8 0
2 years ago
2/7 times 5 and 1/2 simplified
rjkz [21]

Answer:

1.928

Step-by-step explanation:

7 0
3 years ago
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Anna [14]

Answer:

y=x/2

Step-by-step explanation:

If one line is perpendicular to another, then the product of their slope is -1.

y = –2x+8. This line has a slope of -2. Which means another line must have a slope of 1/2.

By knowing the slope, we then assume this line as x-2y=k. Insert the point in, we find out k=0.

So the equation of this line is x-2y=0, or y=x/2.

7 0
2 years ago
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