Answer:
54321
Step-by-step explanation:
════════ ∘◦❁◦∘ ════════
<h3>Answer = -7</h3>
════════════════════
<h3>Known</h3>
a = 13
U2 = 6
U3 = -1
U4 = -8
════════════════════
<h3>Question</h3>
d = ..?
════════════════════
<h3>Way to do </h3>
#since it gives a lot of number, i will just pick one of the nth term, ill choose U2
Un = a + (n-1)d
U2 = 13 + (2-1)d
6 = 13 + d
6 - 13 = d
d = -7
════════════════════
<h3>Note</h3>
• The formula of arithmetic sequence
<h2>Un = a + (n-1)d</h2>
n = nth term
a = first term
d = common difference
════════════════════
Answer: the answer is c
Step-by-step explanation:
Answer:
The last option
Step-by-step explanation:
To find a percentage of something you need
The expected is correct marks, the total is the total amount - then you multiply by 100 to turn the decimal into a percentage.
Answer:
Exterior angle of a decagon will be 36°
Step-by-step explanation:
Measure of all interior angles of a polygon is represented by (n - 2)×180°
where n is the number of sides of the polygon.
Now we have to calculate the exterior angle of a regular decagon.
As we know exterior angle of polygon is supplementary of the interior angle.
So we will calculate interior angle first.
Sum of interior angles of decagon = (n - 2)×180° = 8×180° = 1440°
Since decagon is regular so all angles will be same.
So one angle of decagon = 1440 ÷ 10 = 144°
Now exterior angle = 180 - 144 = 36°
Each exterior angle of a decagon will be 36°.
