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Advocard [28]
3 years ago
5

The Venn diagram shows how many of the employees at a bookstore speak Spanish, Chinese, and Russian.

Mathematics
2 answers:
Lostsunrise [7]3 years ago
8 0

Answer:

The correct answer is D: 28

geniusboy [140]3 years ago
8 0

Answer : The correct option is, (B) 17

Step-by-step explanation :

From the Venn diagram we Conclude that:

Number of employees speak Spanish = 8

Number of employees speak Chinese = 6

Number of employees speak Spanish and Chinese (both) = 3

As per question, now we have to determine the number employees who speak either Spanish or Chinese (or both).

Number of employees speak either Spanish or Chinese (or both) = Number of employees speak Spanish + Number of employees speak Chinese + Number of employees speak Spanish and Chinese (both)

Number of employees speak either Spanish or Chinese (or both) = 8 + 6 + 3

Number of employees speak either Spanish or Chinese (or both) = 17

Thus, the number of employees speak either Spanish or Chinese (or both) are, 17

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A random sample of 100 automobile owners in thestate of Virginia shows that an automobile is driven onaverage 23,500 kilometers
Anastaziya [24]

Answer:

a) 22497.7 < μ< 24502.3

b)  With 99% confidence the possible error will not exceed 1002.3

Step-by-step explanation:

Given that:

Mean (μ) = 23500 kilometers per year

Standard deviation (σ) = 3900 kilometers

Confidence level (c) = 99% = 0.99

number of samples (n) = 100

a) α = 1 - c = 1 - 0.99 = 0.01

\frac{\alpha }{2} =\frac{0.01}{2}=0.005\\ z_{\frac{\alpha }{2}}=z_{0.005}=2.57

Using normal distribution table, z_{0.005 is the z value of 1 - 0.005 = 0.995 of the area to the right which is 2.57.

The margin of error (e) is given as:

e= z_{0.005}\frac{\sigma}{\sqrt{n} }  = 2.57*\frac{3900}{\sqrt{100} } =1002.3

The 99% confidence interval = (μ - e, μ + e) = (23500 - 1002.3, 23500 + 1002.3) =  (22497.7, 24502.3)

Confidence interval = 22497.7 < μ< 24502.3

b) With 99% confidence the possible error will not exceed 1002.3

5 0
3 years ago
Simplify: -|-15|<br><br> please answer correctly i'll give brainliest and 5-star rating.
12345 [234]

Answer:

-15

Step-by-step explanation:

<u>Definition of absolute value: </u>

<em>Distance from zero on a number line. </em>

<em />

Imagine a number line with 0 in the middle of it. Now mark the number 3 on it. Also mark the <em>opposite </em>of 3, which is -3. What is the <u>distance</u> from zero to those 2 points? it's 3.

This is exactly like saying |3| = 3 and |-3| = 3

Even if the number inside absolute value is negative, it <em><u>simplifies</u></em> to the positive of the same number.

_______________________________

So let's talk about your problem.

-|-15|

> the absolute value simplifies to 15

-|-15| = - 15

So that ends up being your answer.

-15

Hope this helps!!!!!!!

7 0
2 years ago
A movie theater gave out 50 coupons for $3 off each movie. What is the total amount of discounts provided by the theater?
hammer [34]
50 coupons for $3 dollars off = 50 * 3 = $ 150 worth of discounts
8 0
3 years ago
Read 2 more answers
Sonny has $24 and Jerry has $9.56. What is the total amount of money, in
Lerok [7]

Answer:

$33.56

Step-by-step explanation:

If you add 24 and 9 together you will get $33. When you add the 56 cents, you will get $33.56.

7 0
3 years ago
Need a graphing calculator for math class he finds a $60 model on sale for 15% off if he decides to buy the calculator how much
miss Akunina [59]
$60-15%=$51 so $51 is the answer
6 0
3 years ago
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