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never [62]
3 years ago
8

What is the perimeter of the rhombus below?

Mathematics
1 answer:
DiKsa [7]3 years ago
4 0

Answer:A

Step-by-step explanation:

from Pythagoras principle we get:

Hypotenuse=√(4^2+2^2)

Hypotenuse=√(4x4+2x2)

Hypotenuse=√(16+4)

Hypotenuse=√(20)

Hypotenuse=√(4x5)

Hypotenuse=√4 x √5

Hypotenuse=2 x √5

Hypotenuse=2√5

Perimeter=4 x hypotenuse

Perimeter=4 x 2√5

Perimeter=8√5

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N = 9
g100num [7]

Answer:

The <em>p</em>-value is 0.809.

Step-by-step explanation:

In this case we need to perform a significance test for the standard deviation.

The hypothesis is defined as follows:

<em>H</em>₀: <em>σ</em>₀ = 4 vs. <em>Hₐ</em>: <em>σ</em>₀ ≤ 4

The information provided is:

<em>n</em> = 9

<em>s</em> = 3

Compute the Chi-square test statistic as follows:

\chi^{2}=\frac{(n-1)s^{2}}{\sigma_{0}^{2}}

     =\frac{(9-1)\cdot (3)^{2}}{(4)^{2}}\\\\=\frac{8\times 9}{16}\\\\=4.5

The test statistic value is 4.5.

The degrees of freedom is:

df = n - 1

   = 9 - 1

   = 8

Compute the <em>p</em>-value as follows:

p-value=P(\chi^{2}_{9}>4.5)=0.809

*Use a Chi-square table.

Thus, the <em>p</em>-value is 0.809.

7 0
2 years ago
Just do these two problems for me and I’ll be so happy
sveticcg [70]
5. y = x + 7
6. y = -x + 1
4 0
2 years ago
Helppppp god bless u
Vanyuwa [196]
Lets be a price of the calculator - $ a
then , after using the coupon, you need to pay $(a-18)
and after using 15% discount , you need to pay (1-0.15)a=0.85a

then, if 
(a-18) will be more than 0.85a, you should prefer 0.15 % discount, because it will be cheaper,

a-18> 0.85a
a-0.85a>18
0.15a > 18
a>120, that means that if the price of the calculator more than $120, 15% discount is better,
but if the price of the calculator is less than $120, you should choose $ 18 coupon.

for example, we have the price of the calculator $100
100-18=82,
100*0.85 =85, coupon is better.

If the price of the calculator $200
200-18=182,
200*0.85=170, so 15% discount is better

if price of the calculator is $120,
120-18=102
120*0.85=102, 
it will not matter, what you are going to use, because you are going to pay the same amount of money





5 0
3 years ago
Read 2 more answers
To convert a percent to a fraction, which of the following is not done?
slavikrds [6]
What you do, to convert a percention to a fraction is to divide the percent by 100. This will give you the fraction of that percent. Knowing this, you can eliminate all the other possible answers that have been listed.
4 0
3 years ago
Find the area A of a circle with a radius of 2.4yd. Round the answer to the nearest hundredth. Use 3.14
dezoksy [38]

Answer: 18.09yd

Step-by-step explanation:

A=πr^2

A= 3.14*2.4^2

A= 18.09yd

5 0
3 years ago
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