Answer:
See below
Step-by-step explanation:
She combined 3x and - 9x incorrectly
she should have gotten - 6 x not - 12 x
So first its 20 x 20 which is 400 so then the lawnmower does 80 per min so 80 x 5 and u get 400
Answer:
I am sorry but I do not know
Step-by-step explanation:
we know that
Additive identity property:
If we add a real number to zero or add zero to a real number, then we get the same real number back.
The number zero is known as the identity element, or the additive identity.
For example: a+0 =a
we can see that adding gives same result
so, 0 is the additive identity here
Hence , option-B........Answer
