First since theres 20 sides multiply the side by 2 and do the same for the base
Answer:
Option C is correct
a + 0 = a
Step-by-step explanation:
Additive identity:
For any real number x,

We have to find an example of the additive identity from the given options.
Option A.
a+(-a) = 0
Which does not follow the additive identity.
Option B.
a+0 = 0
which does not follow the additive identity.
Option C.
a+0 = a
this equation follows the additive identity.
Therefore,an example of the additive identity is, a + 0 = a
Answer:

Step-by-step explanation:
The formula of an area of a kite:

d₁, d₂ - diagonals
We have A = 120 cm² and d₁ = 16 cm. Substitute:

<em>divide both sides by 8</em>

Answer:
D. 12n-5
Step-by-step explanation:
you will do 4 times 3n and you will get 12n then you will do 4 times -5 and you will get -20 and then finally you will have 12n-5 (Distribute)
I'm assuming you're looking for 3.54x10^2