4-9=-5
3×(-5)=-15
49-15=34
Always start with the parentes
Answer:
The area = 182.52 sq units.
Step-by-step explanation:
- Area of regular polygon can be found by splitting into smaller triangles.
- Each triangle has base as side of polygon and vertex as center of polygon.
now consider ΔOAB,
we know ∠AOB = 
° =72°
<h3> (this is due to symmetry)</h3>
as ∠AOD = (∠AOB)/2 = 36°
Now we know AD=AB/2 =
=5.15 m
using trignometric relation tan(∠AOD) =
⇒OD = 
= 
AREA OF TRIANGLE = BASE × HEIGHT /2
area of ΔOAD = 
× 5.15 ×
= 
<u>As there are 10 such triangles like </u>ΔOAD
Total area =10×
= 182.525447428574
I suppose the third term should say -10/3, not -103.
Notice that
-2 = -6/3
-4 = -12/3
so that, starting with the first term <em>a</em>(1) = -6/3, the every following term is obtained by subtracting 2/3.
-2 - 2/3 = -6/3 - 2/3 = -8/3
-8/3 - 2/3 = -10/3
-10/3 - 2/3 = -12/3 = -4
and so on.
So the recursive rule is
<em>a</em>(1) = -2,
<em>a</em>(<em>n</em> + 1) = <em>a</em>(<em>n</em>) - 2/3, for <em>n</em> ≥ 1
or C.
Well if 12 and 36 is a fraction then it would most likely be 1/3 , I asked my teacher and this is what she said.
