Answer:
2
Step-by-step explanation:
step 1) simplify
11/14-x/4=2/7
-x/4=2/7-11/14
-1/4x=-1/2
divide both sides by -1/4
x=2
Answer: 2, 4, and 5
Step-by-step explanation:
IQR is the third quartile minus the first quartile. The median is the middle number. The range is the biggest number minus the smallest. Hope this helps.
Answer:
To the power 3 means cube.
Whenever you cube an even number it is a multiple of 8.
Whenever an exponent is used on 4, the number is always a square.
Answer:
The perfect square ( x -1 )² = 2
Step-by-step explanation:
<u><em>Explanation:-</em></u>
Given equation x² - 2 x = 1
⇒ x² - 2 x + 1 -1 = 1
⇒ x² - 2x + 1² = 1 +1
⇒ ( x -1 )² = 2
Answer:
57.885
Step-by-step explanation:
For such calculations a probability calculator is very helpful. The one in the attachment shows the 87th percentile to be 57.885.
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A table of the standard normal distribution will tell you the 87th percentile corresponds to a z-value of 1.12639. Then the X value is ...
X = Zσ +μ = 1.12639(7) +50 = 57.885