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Sergeu [11.5K]
3 years ago
8

8) The equation of a line that has a slope of -2 and a y-intercept of 3 is:

Mathematics
1 answer:
Eva8 [605]3 years ago
5 0
The bb and j was the source of the questions
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A normal population has a mean of 12.2 and a standard deviation of 2.5. compute the z value associated with 14.3. what proportio
Citrus2011 [14]
The z-score associated with 14.3 is 0.84.  0.2995 of the population is between 12.2 and 14.3.  0.1894 of the population is less than 10.0.

The formula for a z-score is

z=(X-μ)/σ

With our data, we have:
z=(14.3-12.2)/2.5=0.84

The z-score associated with the mean is 0.5.  To find the proportion of the population between the mean and 14.3, subtract 0.7995 (the proportion of population below the z-score of 0.84, using http://www.z-table.com) and 0.5:

0.7995 - 0.5 = 0.2995.

The z-score for 10.0 is

(10.0-12.2)/2.5 = -0.88.  The proportion of the population less than this is 0.1894.
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3 years ago
Can someone help me and show your work!!! PLEASE!!!! 50 POINTS
crimeas [40]

None of the above

My mom just helped me with it, so I don't know if it's exactly alright. She said it was 20, but theres no 20 as I checked, and I don't know if she didn't right. I got a whole 25.

ANSWERS I THINK

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I think its mainly a,e, or b. Mainly b?

6 0
3 years ago
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What type of proportion is shown in 12 : 4 = 24 : 8?​
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3:1

Step-by-step explanation:

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Expand and simplify (5x+2)(2x-3)
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10x^2 - 11x - 6

Step-by-step explanation:

(5x+2)(2x-3)

= 10x^2 - 15x + 4x - 6

= 10x^2 - 11x - 6

3 0
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Which best describe a vector​
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Vectors are used to represent physical magnitudes that have an associated address.For example,if we want to represent the displacement of an object,it is not enough to describe only the distance as 10 meters, it is also necessary to describe in which direction the displacement occurred,for example,30°towards the northeast.

Hope this helps:)

6 0
3 years ago
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