Answer:
x=20
Explanation:
3x-10+5x+30=180 (co-interior angles=180)
8x+20=180
8x=160
x=20
The correct answer for the question that is being presented above is this one: "oxygen became available from cyanobacteria." About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because oxygen became available from cyanobacteria.
Answer:
A
Explanation:
The body of water labeled number 3 is Orinoco river.
The body of water labeled number 7 is the Atlantic ocean.
