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insens350 [35]
3 years ago
13

How many lines of reflectional symmetry does the trapizoid have

Mathematics
1 answer:
inysia [295]3 years ago
6 0
Is their an image to go along with this question ?
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In 3 hours, a car travels 120 miles. What is the speed of the car
ludmilkaskok [199]
120/3=40
40 miles an hour
3 0
2 years ago
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A 250-kVA, three-phase, 480-volt transformer requires 75 gallons of insulating oil to keep it properly cooled. How many liters i
Dennis_Churaev [7]

This problem can be directly solved by using a conversion factor. Simple research will tell us that 1 gallon contains about 3.78 Liter. Therefore the volume in Liter is:

volume = 75 gallons * (3.78 Liter / gallon)

<span>volume = 283.5 Liters</span>

7 0
2 years ago
Alex wants to test the reliability of “lie detector tests,” or polygraph tests. He performs a polygraph test on a random sample
VladimirAG [237]

The correct statement is test is reliable and authentic as the probability of no false positives is more than 0.5

Given that

H_o:P= 0.50\\\\H_1:P>0.50

Now following calculations to be done to reach out the conclusion

There is no false positive as

= 100 - 5.5

= 94.5%

\hat P =0.945, n = 12

Now

z = \frac{\hat P - P}{\sqrt\frac{P(1-P)}{n} }\\\\=\frac{0.945-0.5}{\sqrt\frac{0.5\times0.5}{12} }  \\\\= 3.08

So

P value = P(z >3.08) = 0.0010

Therefore we can conclude that test is reliable and authentic as the probability of no false positives is more than 0.5

Learn more about the polygraph test here:

brainly.com/question/3790493

4 0
3 years ago
Which mean absolute value represents more consistency 15.2 or 10.9
pychu [463]

Given :

Two mean absolute value deviation 15.2 and 10.9 .

To Find :

Which mean absolute value deviation represents more consistency 15.2 or 10.9 .

Solution :

First we should know what is mean absolute deviation ( M.A.D) is :

M.A.D of a data set is the average distance between each data value and the mean .

It also describe the variation in a data set .

Also , high variability means the data is spread out and low variability means that data is clustered .

So, low variation means more consistency and vice-versa .

Therefore , 10.9 M.A.D is more consistent .

Hence , this is the required solution .

8 0
3 years ago
What is the quotient of -5 divided by -1?
creativ13 [48]

Answer:

-5 divided by -1 would equal 5.

Step-by-step explanation:

A neative divided by a negative would equal a positive.    

8 0
2 years ago
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