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chubhunter [2.5K]
3 years ago
14

HELP! 15 POINTS AND BRAINLIEST!

Mathematics
2 answers:
11Alexandr11 [23.1K]3 years ago
7 0

Answer:

8x squared 3

Step-by-step explanation:

hope this helps hope you get it right answer is d

Artyom0805 [142]3 years ago
6 0

Answer:

d

Step-by-step explanation:

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The defect length of a corrosion defect in a pressurized steel pipe is normally distributed with mean value 30 mm and standard d
skelet666 [1.2K]

Answer:

z=-0.842

And if we solve for a we got

a=30 -0.842*7.8=23.432

So the value of height that separates the bottom 20% of data from the top 80% is 23.432.  

Step-by-step explanation:

Let X the random variable that represent the heights of a population, and for this case we know the distribution for X is given by:

X \sim N(30,7.8)  

Where \mu=30 and \sigma=7.8

For this part we want to find a value a, such that we satisfy this condition:

P(X>a)=0.80   (a)

P(X   (b)

As we can see on the figure attached the z value that satisfy the condition with 0.20 of the area on the left and 0.80 of the area on the right it's z=-0.842

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=-0.842

And if we solve for a we got

a=30 -0.842*7.8=23.432

So the value of height that separates the bottom 20% of data from the top 80% is 23.432.  

8 0
3 years ago
Completethe equationso that it has no solution.5x – 4 = 5 + ?​
Naddik [55]

Step-by-step explanation:

5x−4=5

1 Add 44 to both sides.

5x=5+4

5x=5+4

2 Simplify 5+45+4 to 99.

5x=9

5x=9

3 Divide both sides by 55.

x=\frac{9}{5}

x=

5

9

4 0
2 years ago
The angle measures of a triangle are shown.
madreJ [45]

Answer:

<B = 3(14) + 6 = 48 degrees

Step-by-step explanation:

4x+6+3x+6+5x = 180 degrees

12x + 12 = 180

12x = 180 - 12

x = 168/12

x = 14

4 0
3 years ago
T = 4v + 3<br> (a)<br><br> (b) Make V the subject of the formula T = 4v + 3
Natasha2012 [34]
T - 3 = 4v
(T - 3) / 4 = v
8 0
3 years ago
3/4 pounds make how many oz?
IRISSAK [1]

Answer:

12

Step-by-step explanation:

5 0
2 years ago
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