True or false: we can establish causation whenever a random sample is taken.

1 answer:

5 0

Causation conclusion can only be made when the experiement is preformed. Due to the potential confounding variables in observational studies which include random samples.

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aleksklad [387]

<span>Anna learns in her science class that the human eye blinks an average of 4,200,000 times a year. What is this number expressed in scientific notation?</span>

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There are 56 treats to be given to 10 pets. Some of those are cats, others are dogs.

Elza [17]

Your equations would be

c+d=10
5c+6d=56 (c= # of cats, d= # of dogs) Then solve

I am using elimination and multiply the first equation by -5

-5c-5d=-50
5c+6d=56

Then eliminate

-d=-6 Divide by -1 d=6

Then solve for c

c+6=10
c=4

Hope this helps!

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Two ice cream shops in the mall sell sundaes. Let x equal the number of scoops of ice cream. Larry's ice cream shops price is re

Gnesinka [82]

Answer:

The answer is: The two shops never charge the same price for sundaes with the same number of scoops.

Step-by-step explanation:

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Determine the value of x

victus00 [196]

Answer: 4

Step-by-step explanation:

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3 years ago

You need 320 mL of a 65% alcohol solution. On hand, you have a 60% alcohol mixture. How much of the 60% alcohol mixture and pure

Damm [24]

Answer:

You will need

280 mL of the 60% solution

and 40 mL of pure alcohol.

Step-by-step explanation:

Let 'x' be the amount of 60% alcohol solution and y the amount of pure alcohol.

Therefore:

(0.6x + y)/320 = 0.65 ⇒ 0.6x + y = 208

x + y = 320

Solving the sistem of equations:

x = 280 and y = 40

Therefore, You will need

280 mL of the 60% solution

and 40 mL of pure alcohol.

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