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oee [108]
3 years ago
7

Plz help me with this

Mathematics
1 answer:
allochka39001 [22]3 years ago
7 0

Answer:  B) 160

<u>Step-by-step explanation:</u>

Since the Standard deviation of 21 bins is 3 bins, then the first 7 bins falls in the first 2.5% edge of the bell curve.

2.5% of 21 times 1000 = (0.025)(21)(1000) = 160

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Let M(x)=4x2−3x and N(x)=−5x3−6x2−3. Find M(x)−N(x)
8090 [49]

Answer:

5x³+10x²-3x+3

Step-by-step explanation:

(4x²-3x) - (-5x³-6x²-3)

5x³+10x²-3x+3

8 0
3 years ago
Hellllpppppppp for the 10th time lol
liubo4ka [24]
The answer is 44

STEP BY STEP:

180 is the sum of all angles it’s constant! You have to remember that okay!

1) 180-92
= 88
2) Divide 88 by 2
You’ll get 44
In isosceles triangles 2 angles are same.
3 0
3 years ago
Read 2 more answers
What is the value of A in the equation A= -a+6
saul85 [17]

A=3

A=-a+6

A+A=6

2A=6

6÷2=3

A=3

7 0
4 years ago
Read 2 more answers
Based on historical data, your manager believes that 39% of the company's orders come from first-time customers. A random sample
Irina-Kira [14]

Answer:

z= \frac{0.21- 0.39}{0.0373}= -4.829

z= \frac{0.32- 0.39}{0.0373}=-1.877

And we can find the probability with this difference:

P(-4.829

Step-by-step explanation:

For this case we have the following info given:

n = 171 represent the sample size

p =0.39 the proportion of interest

We want to find the following probability:

P( 0.21 < \hat p < 0.32)

We can use the normal approximation for this case since np >10 and n (1-p) >10

For this case we know that the distribution for the sample proportion is given by:

\hat p \sim N( p , \sqrt{\frac{p (1-p)}{n}} )

And we can use the following parameters:

\mu_{\hat p}= 0.39

\sigma_{\hat p} =\sqrt{\frac{0.39*(1-0.39)}{171}}= 0.0373

And we can apply the z score formula given by:

z = \frac{p \\mu_{\hat p}}{\sigma_{\hat p}}

And using this formula we got:

z= \frac{0.21- 0.39}{0.0373}= -4.829

z= \frac{0.32- 0.39}{0.0373}=-1.877

And we can find the probability with this difference:

P(-4.829

 

6 0
3 years ago
The slope of the line is m=3/4. One point is (x, 2) and (3,-4)<br> Find X
Viktor [21]

Answer:

x is 11

Step-by-step explanation:

We know the slope (3/4) and a point (3,-4), so we can use point-slope form (y-y1=m(x-x1)

Substitute the numbers into the equation

y--4=3/4(x-3)

simplify

y+4=3/4(x-3)

do the distributive property

y+4=3/4x-9/4

subtract 4 from both sides

y=3/4x-25/4

this is the equation of the line.

Since it says that (x,2) is a point in the equation, we can substitute it into the equation

2=3/4x-25/4

add 25/4 to both sides

33/4=3/4x

multiply by 4/3

11=x

we can double check by plugging (11,2) into the equation of the line.

2=3/4(11)-25/4

2=33/4-25/4

2=2

it works! :)

Hope this helps!

7 0
3 years ago
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