Answer:
B) -3(1.5n-1)
Step-by-step explanation:
It’s 27. 58 and 5/12 rounds down to 58, 30 and 5/7 rounds up to 31. 58-31= 27
Each one of the smaller angles x = 120 degrees and the larger angle = 2x = 2 × 120 = 240 degrees
<h3>How to find the angle of octagon?</h3>
The angle of an octagon can be found as follows;
An octagon is a polygon that has 8 sides.
The sum of angles in an octagon is 1080 degrees.
Therefore,
x + x + x + x + x + x + x + 2x = 1080
Hence,
9x = 1080
divide both sides by 9
x = 1080 / 9
x = 120
Therefore, each one of the smaller angles x = 120 degrees and the larger angle = 2x = 2 × 120 = 240 degrees
learn more on octagon here:brainly.com/question/8517157
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Answer:
Step-by-step explanation:
r = 21/42 = 1/2 ( also 10.5 / 21 = 1/2)
This is a Geometric Sequence with first term 42 and common ratio 1/2.
