Type the correct answer in each box, Write the coordinates in the form (x, y). If necessary, use / for the fraction bar(s).
1 answer:
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Answer:
Option B is your answer. If I'm right so,
Please mark me as brainliest. thanks!!!
- subtract the 12 from both sides so that it becomes the last constant term in the quadratic equation which should now equal 0.
- take the 4x
- half the coefficient of 4 (2)
- square it (4)
- add it to the equation (+4)
- subtract it from the equation (-4)
- factorise the square (x+2)^2 expands to (x^2 + 4x + 2) as {a+b}^2={a^2 + ab + ba + b^2}
- now the equation is in turning point form.
- to find x, add 16 and square root 16 and (x+2)
- subtract 2 from positive or negative 4 (as -4^2 and 4^2 both equal 16).
- This should give you two values for x, -6 and 2.
I really hope that this helped :)
Answer: Fourth Option:
<em>"A tree with a height of 6.2 ft is 3 standard deviations above the mean"</em>
Step-by-step explanation:
It is said that an X value is found Z standard deviations from the mean mu if:
In this case we have that:
We have four different values of X and we must calculate the Z-score for each
For
This means that: <em>A tree with a height of 5.4 ft is 1 standard deviation </em><em>above </em><em>the mean</em>
First Option: False
For
This means that: <em>A tree with a height of 4.6 ft is 1 standard deviation </em><em>below </em><em>the mean</em>
Second Option: False
For
This means that: <em>A tree with a height of 5.8 ft is </em><em>2 </em><em>standard deviation </em><em>above</em><em> the mean</em>
Third Option: False
For
This means that: <em>A tree with a height of 6.2 ft is 3 standard deviations </em><em>above</em><em> the mean.</em>
Fourth Option: True