Substitution:
7y=1-10x
-5x-7(1-10x)=4
X=1
-5(1-7y)=4
Y=-9/7
Therefore, your answer would be {1,-9/7}
Can you ask on english? please
I believe it is D. More African elephants today naturally lack tusks compared to the elephant populations 100 years ago, because big game hunters sought elephants for ivory.
When energy flows from one trophic level to the next trophic level most of the energy lost as heat in the process. (D)
The energy decreases by 10% every time you go up a trophic level.
Hope it helped! hit the brainliest button if it's there! <3
