We can see from this survey that 7 teenagers prefer rock and roll.
The number of all teenagers in the survey is:
12 + 5 + 7 + 6 + 6 + 4 = 40
P ( rock ) = 7 / 40
Answer: C ) 7 / 40
<h2>
Answer:</h2>
D. Inscribed angle
<h2>
Step-by-step explanation:</h2>
An inscribed angle has a vertex on the circumference. For any arc, every inscribed angle is exactly half of the central angle. In other words, if the central angle is
and the inscribed angles is
, then it is true that:

In this problem
, then the central angle is 
Answer:
hope this helps you!!!
Step-by-step explanation:
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A suitable calculator can row-reduce the augmented matrix.
first number: 3
second number: 1
third number: 8