Which one did you choose first? it’s either B or C, i’m leaning more towards B though :))
You can multiply either the top or bottom equation by -1 so lets say you apply it to the bottom equation it’ll look like this:
-9x + 9y = 18
6x - 9y = 12
then the +9y and -9y will cancel out
-9x = 18
6x =12
then you add the two equations together
-3x = 30
divide both sides by -3
x = -10
Answer:
3



If any numbers or constant power is zero then it will be 1
Answer:
23.333 percent
Step-by-step explanation:
7/30 of the students are undecided.
The best estimate for the length of a bean would be B: 13 cm