Simplify 4 + (−3 − 8)
2 answers:
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Answer:
C
Step-by-step explanation:
Using the rule of radicals
×
⇔
Simplifying each radical before combining them.
=
= ×
= 3
-----------------------------------------------------------------------------
=
= ×
= 5
---------------------------------------------------------------------------
Hence
2(3) - 3(5
= 6 - 15
= - 9 → C
Answer:
5 classes.
Step-by-step explanation:
You can use the rule to determine the number of classes for a frequency distribution.
The rule says that
where
is the number of classes
is the number of the data points
We know that the number of data points is = 20.
Next, we start searching for so that we can get a number 2 to the
that is larger that the number of data points.
This suggests that you should use 5 classes.