The dot plot shown represents the number of students enrolled in each of the 16 courses at a community college. A new course has
started and has 65 enrolled students. Select all of the following statements that are NOT true.
a
The median class size does not change.
b
The mean is lower.
c
The range increases by 40.
d
The mode increases.
a
The median class size does not change.
b
The mean is lower.
c
The range increases by 40.
d
The mode increases.
2 answers:
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Answer:
B:
Step-by-step explanation:
1. Substitute for c:
2. Solve substitution:
3. Compare to calculated answers when
4. when
is
Answer:
Step-by-step explanation:
To factor the expression, remove the greatest common factor or GCF from each term. Both terms share in common xy. The expression becomes:
What remains in the parenthesis is a different of perfect squares. Factor the difference of perfect squares into two binomials of the form (x+a)(x-a) where a is the square root of .
So the expression becomes: