Answer:
12 7/10
Step-by-step explanation:
13 - 12/40
Simplify the fraction
13 - 3/10
Borrow 1 from 13 in the form of 10/10
12 + 10/10 - 3/10
12 7/10
I think the best answer to it is that the polygon is a Square is because the side of the polygon stays the same when it is reflected and rotated. And the best answer among your choices is letter A. Square. I hope you are satisfied with my answer and feel free to ask for more
No because then somewhere in the problem you could multiply once more. like if u had 234 as ur answer, but had 2 as a remainder, u would change the 4 to a 5 (don't know if tht math is right, but the main idea of it is right)
I want to solve it in a simple way: let's combine the right side of the two equations together(since they are all equal to y) we could get:

, remove

, we have:

, then we have: x=1
Then we have y = -1-5-4=-10, we could also test our result by put x=1, y=-10 into the second equation, and turns out the result is right.