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VladimirAG [237]
2 years ago
8

True or false when we carry out a chai square test of Independence the alternate hypothesis states that the two relevant classif

ications have our - 1 * c - 1 degrees of freedom
Mathematics
1 answer:
Anna35 [415]2 years ago
6 0

Answer: False

Step-by-step explanation:

degrees of freedom=(r-1)(c-1)

I don't know if I'm exactly right

if not sorry

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How tall is a building that casts a 61-fit shadow when the angle of elevation of the sun is 60 degrees?
VladimirAG [237]

Answer:

106 ft

Step-by-step explanation:

Assuming the shadow is measured along horizontal ground.

tanθ =opp/adj = building height/shadow length

building height = shadow length(tanθ)

h = 61tan60

h = 105.65509...

4 0
3 years ago
Solving systems of equations algebraically.
Elanso [62]

Answer:

x = 2

y = -1

Step-by-step explanation:

Since it gives you the value of y already, just plug that into the equation, like so:

y = 4x - 9

x - 3 = 4x - 9

<em><u>Subtract the x from both sides:</u></em>

x - 3 = 4x - 9

-x       - x

__________

-3 = 3x - 9

<em><u>Then, add 9 to both sides:</u></em>

-3 = 3x - 9

+9        + 9

________

6 = 3x

<em><u>Divide both sides by 3:</u></em>

2 = x

<em><u>Now plug in x for y:</u></em>

y = x - 3

y = 2 - 3

y = -1

8 0
3 years ago
8i-(12-4i)+7√-9<br><br> show work please
Tanya [424]

Answer:

33i - 12

Step-by-step explanation:

8i - (12 - 4i) + 7 \sqrt{ - 9}   \\  = 8i - 12  + 4i + 7 \sqrt{9  \times ( - 1)}  \\ = 12i - 12 + 7 \times 3 \sqrt{ - 1}  \\ = 12i - 12 + 21i  \:  \: ( \because  \sqrt{ - 1} = i)\\  = 12i + 21i - 12 \\   \therefore \red{ \bold{8i - (12 - 4i) + 7 \sqrt{ - 9} }=  \purple{ \bold{33i - 12}}}

5 0
3 years ago
What is the area of the parallelogram?
madreJ [45]

Answer:

60 in²

Step-by-step explanation:

Area = base × height

= 15×4 = 60in²

4 0
3 years ago
Read 2 more answers
A croissant shop has plain croissants, cherry croissants, chocolate croissants, almond croissants, apple croissants, and broccol
rjkz [21]

Answer:

27405

Step-by-step explanation:

There are 6 different variants available for each croissant. There are 26 croissants in all out of which 1 is plain. We use combination and permutation technique to identify different ways to choose croissant.

[5 + 26 - 1 ] 26 = 30C26 = 27405.

5 0
2 years ago
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