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irakobra [83]
3 years ago
8

Helppp please if anyone know

Mathematics
2 answers:
zmey [24]3 years ago
7 0
81 - 35+30 (55) = 26 therefore 26cm is ur final answer
dmitriy555 [2]3 years ago
3 0
The unknown length is x= 26
20+35=55
55+26=81
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For employees at a large company, the mean number of overtime hours worked each week is 9.2 hours with a population standard dev
topjm [15]

Answer:

z=\frac{9.3-9.2}{\frac{1.6}{\sqrt{49}}}= 0.4375

And we can use the normal table and the complement rule we got:

P(z>0.4375)= 1-P(z

Step-by-step explanation:

For this case we have the following parameters given:

\mu = 9.2 , \sigma =1.6

We select a ample size of n=49. And we want to find this probability:

P(\bar X> 9.3)

And for this case is a right tail probability and we can use the z score formula given by:

z=\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

And replacing we got:

z=\frac{9.3-9.2}{\frac{1.6}{\sqrt{49}}}= 0.4375

And we can use the normal table and the complement rule we got:

P(z>0.4375)= 1-P(z

8 0
3 years ago
What does a ≠ 0 mean? Doesn't it mean it could be any number other than 0? Thanks, for any help! (:
viktelen [127]
Yes, you are correct. 

4 0
3 years ago
Read 2 more answers
If the circumference of a circle measures 3pi. cm, what is the area of the circle in terms of pi.
fgiga [73]

Answer:

the circumference equation is 2pi r and the circumference for this problem is 3pi so that would mean that the radius is 1.5

with that info, we can find out the area of the circle which is pi r squared.

1.5*1.5=2.25

AREA=2.25pi

3 0
3 years ago
What equals 7 in multiplication
Zanzabum
Will there's 
5.5 x 2 = 11

hope that helped
8 0
4 years ago
Help plz solve these equations by completing the square <br><br>x square + 12x =1
Hitman42 [59]

Answer:

x = - 6 ± \sqrt{37}

Step-by-step explanation:

Given

x² + 12x = 1

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(6)x + 36 = 1 + 36

(x + 6)² = 37 ( take the square root of both sides )

x + 6 = ± \sqrt{37} ( subtract 6 from both sides )

x = - 6 ± \sqrt{37} ← exact solutions

3 0
3 years ago
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