Answer:
Hypothesis Testing
Step-by-step explanation:
According to my research on different experimental designs, I can say that based on the information provided within the question the researcher has engaged in what is known as Hypothesis Testing. This is the process of designing an experiment involving variables to test a certain hypothesis in order to conclude whether it is true of not.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
The equation of the circle with center at (2,-4) and tangent to the line x = -2 is given by:
(2) (x - 2)² + (y + 4)² = 16
<h3>What is the equation of a circle?</h3>
The equation of a circle of center 
and radius r is given by:
The circle has center at (2,-4), hence 
.
The center is tangent to the line x = -2, hence it has a point at x = -2, since |-2 - 2| = 4, r = 4 -> r² = 16.
Hence the equation of the circle is given by:
(2) (x - 2)² + (y + 4)² = 16
More can be learned about the equation of a circle at brainly.com/question/24307696
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Substitute the given into the function
f(-4) = |7(-4) - 3|
now solve
f(-4) = |-28 - 3|
f(-4) = | -31|
the absolute value of |-31| is 31
so,
f(-4) = 31
Hope this helps :)
The answer is 4 because k+2 would be 2 then times by 6 which is 12 then subtract 8 would be 4
Sum=add. difference=subtract (I'm just answering so you don't waste points)
