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2 years ago

10

The scores on a test are normally distrubuted with a mean of 60 and a standard deviation of 12. What is the score that is 2 1/2

standard deviations above the mean?

1 answer:

Vladimir79 [104]2 years ago

5 0

Answer:

?

Step-by-step explanation:

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Make n the subject of m= 4n-gn+1

Misha Larkins [42]

Answer:

n = (m-1)/(4-g)

Step-by-step explanation:

m= 4n-gn+1

Subtract 1 from each side

m-1= 4n-gn+1-1

m-1 = 4n -gn

Factor out n

m-1 = n(4-g)

Divide each side by (4-g)

(m-1)/(4-g) = n(4-g)/(4-g)

(m-1)/(4-g) = n

n = (m-1)/(4-g)

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2 years ago

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When x = 3 and y = 5, what is the value of 3x2 - 2y?

Mumz [18]

Answer:

8

Step-by-step explanation:

3 times 3 is 9

2 yimes 5 is 10

9 times 2 is 18

18-10 is 8

4 0

3 years ago

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Can y'all find the value of x? (You will earn 19 points if you answer all of these questions. Please make sure they're right bec

Aloiza [94]

Answer:

1. 16/5 2. 4 3. 15 4. 56 5. 15/2 6. -20 7. -3.333333 8. -23/2 9. no solutions 10. -11/2

Step-by-step explanation:

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3 years ago

A group of researchers is most likely to conduct a meta-analysis if an experiment has _________.

juin [17]

Answer: homogeneous

Step-by-step explanation:

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2 years ago

Use these functions a(x) =4x +9 and b(x) =3x -5 to complete the function operations listed below

Sloan [31]

Consider that we need to find $(a+b)(x), (a-b)(x), (ab)(x),\left(\dfrac{a}{b}\right)(x)$ .

Given:

The functions are:

$a(x)=4x+9$

$b(x)=3x-5$

To find:

The function operations $(a+b)(x), (a-b)(x), (ab)(x),\left(\dfrac{a}{b}\right)(x)$ .

Solution:

We have,

$a(x)=4x+9$

$b(x)=3x-5$

Now,

$(a+b)(x)=a(x)+b(x)$

$(a+b)(x)=4x+9+3x-5$

$(a+b)(x)=7x+4$

Similarly,

$(a-b)(x)=a(x)-b(x)$

$(a-b)(x)=4x+9-(3x-5)$

$(a-b)(x)=4x+9-3x+5$

$(a-b)(x)=x+14$

And,

$(ab)(x)=a(x)b(x)$

$(ab)(x)=(4x+9)(3x-5)$

$(ab)(x)=12x^2-20x+27x-45$

$(ab)(x)=12x^2+7x-45$

And,

$\left(\dfrac{a}{b}\right)(x)=\dfrac{a(x)}{b(x)}$

$\left(\dfrac{a}{b}\right)(x)=\dfrac{4x+9}{3x-5}$

Therefore, the required functions are $(a+b)(x)=7x+4$ , $(a-b)(x)=x+14$ , $(ab)(x)=12x^2+7x-45$ and $\left(\dfrac{a}{b}\right)(x)=\dfrac{4x+9}{3x-5}$ .

4 0

3 years ago