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Serga [27]
3 years ago
14

Test scores are normally distributed with a mean of 100 and a standard deviation of 15. An individual score is found to

Mathematics
1 answer:
-BARSIC- [3]3 years ago
6 0

Answer:

Because the boundary value is less than the mean, you automatically know the z score will be negative.

z = (x - mu)/sigma = (90 - 100)/15 = -10/15 = -2/3 = -.67

Step-by-step explanation:

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Simplify (b^4)^3 A.B^9 B.B^3 C.B D.B^12
natulia [17]

(b^4)^3


To simplify when something is raised to two different exponents, multiply the two exponents together:

4 * 3 = 12

You now have b^12.


The answer is D.


6 0
3 years ago
Kevin recorded the effects of violent video games on antisocial behavior.
den301095 [7]

Answer:

B.

Explanation:

Because the study is relying on the effects of violent video games and how it affects anti-social behavior.

If this was a math problem it'd be:

---> y= effect and signs of anti social behavior.

---> x= violent video games.

--->5= Hours spent playing. (Lets use 5 as a random number to write this as an equation then.)

Equation form:

Most likely would look something like this

(5x=y)

Hope this helped. I know it's late but it came up on my "Selected for you" section so I decided I'd answer it.

5 0
3 years ago
Read 2 more answers
What is the constant and missing variable of these problems
Studentka2010 [4]

Answer:

14

Step-by-step explanation:

7 0
3 years ago
Suppose y varies directly with x. Write an equation relating x and y.
jolli1 [7]

9514 1404 393

Answer:

  a.  y = -5x

Step-by-step explanation:

The different signs of x and y tell you the constant of proportionality will be negative (eliminating choices <em>b</em> and <em>d</em>).

A quick trial of the given values shows that choice <em>c</em> is incorrect, and that choice <em>a</em> is correct.

4 0
3 years ago
The standard golf ball has a mass of 45g. How many golf balls are there in a bag weighing 1.8kg?
Butoxors [25]
This is a working backwards question.
Since the golf ball was 45g, and the bag was 1.8kg,we need to make them the same units.
45g= 0.45kg
1.8kg= 1.8kg

Now that the units are the same, we put it in a calculator.


1.8÷0.45= 4

Therefore, there are 4 golf balls in the bags.
We can check this by doing 4×0.45= 1.8

Hope this helped!

4 0
3 years ago
Read 2 more answers
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