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Kobotan [32]
4 years ago
13

PLEASE HELP ASAPP!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
neonofarm [45]4 years ago
7 0
10x^2y^{-2}=\dfrac{10x^2}{y^2}\\\\\\
\dfrac{10\cdot(-1)^2}{(-2)^2}=\dfrac{10\cdot1}{4}=\dfrac{10}{4}=\dfrac{5}{2}=\boxed{2\dfrac{1}{2}}

Answer D)
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A recent study focused on the amount of money single men and women save monthly. The information is summarized next. Assume that
IgorLugansk [536]

Answer:

Both means are apprxoimately equal at 1% level of significance.

Step-by-step explanation:

Given is the information summarised below

Group   Men     Women  

Mean 23.00 28.00

SD 5.00 10.00

SEM 1.00 1.83

N 25     30    

H0: Mean of mean = mean of women

Ha: means of men < mean of women

(Left tailed test)

Since population std deviation is known but sample sizes are small t test is used.

The mean of Men minus Women equals -5.00

standard error of difference = 2.201

t = 2.2721

 df = 53

p value= 0.0136

since p >0.01 at 1% significance level we fail to reject H0.

Both means are apprxoimately equal at 1% level of significance.

7 0
4 years ago
Steve is turning half of his backyard into a chicken pen. His backyard is a 242424 meter by 454545 meter rectangle. He wants to
Tcecarenko [31]

Answer:

51 meters

Step-by-step explanation:

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The length of fencing = The length of the diagonal AC or BD

As the length of both the diagonals of a rectangle are equals, AC=BD.

The length of fencing =\sqrt{l^2+w^2} [length of the diagonal]

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Hence, Steve needs 51 meters of fencing.

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Do you think that value of r in the point ( 1, r) is always the unit rate for any situation?
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