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Leviafan [203]
3 years ago
15

At a coffee shop, 70% of the customers buy a coffee drink, 30% buy food, and 20% buy both a coffee drink and food. Are buying fo

od and buying a coffee drink independent events? How do you know?
Mathematics
2 answers:
Shkiper50 [21]3 years ago
8 0

Yes.

70% of the customers buy a coffee drink and 30% buy food.

The sum of it is 100% already.

So 20% of it just another addition of information since it cannot exceed 100% of percentage (100% + 20% = 120%).

It also contains a subset for both percentage.

Bad White [126]3 years ago
8 0

Answer:

No

Step-by-step explanation:

If independent,

P(C^F) = P(C) × P(F)

0.2 = 0.3×0.7

0.2 = 0.21 is not a true statement

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If there is a positive correlation between number of years studying math and shoe size ​(for children), does that prove that lar
stealth61 [152]

Answer:

The hidden variable is age.

Step-by-step explanation:

That does not prove that  larger shoes cause more studying math or vice versa.

The children with larger shoes are most probably older  so they would have done  more years of studying than the younger ones.

The hidden variable is the age of the child.

8 0
3 years ago
(no fake answers) please help !
Eddi Din [679]

Answer:

19.4 units

Step-by-step explanation:

if perimeter is 2p+2w then the equation is

(2x6.2)+(2x3.5)

12.4+7

19.4 units

hope this helps have a blessed day :)

5 0
3 years ago
A bike racer covers a distance of 220 kilometers in 4 hours. What is the rate x of the bicyclist in kilometers per hour?
DerKrebs [107]
D= rt
Rate= d/t
220/4 = 55
55 = x
6 0
3 years ago
Read 2 more answers
I NEED HELP ASAP PLEASE!
bixtya [17]

Answer:

c


Step-by-step explanation:


7 0
3 years ago
What’s the definition of input and output?
Vika [28.1K]

Input is the same as the x-term and output is the same as the y-term.

For example, take a look at the image provided with thee table.

Looking at the first box of our table, notice that if we subtract 5 from 1, we get -4 and if we subtract 5 from 2 we get -3 and if we subtract 5 from 3, we get -2.  Notice that in each case, we're subtracting 5 from the input to get the output.

I attached a table so you can practice if you'd like to. All you have to do is subtract 5 from each input and you will end up with the output. The first few are done for you. I also provided an answer key in the next image so you can check your work.

The last one might be a little trick. In the input, we have n which is a variable that represents any number. If we want to find the nth term, we simply subtract 5. So we have n - 5.

First image is practice if you'd like and the second is the key.

If you don't want to do it, no worries.

4 0
4 years ago
Read 2 more answers
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