What are 3 ecosystems of the Andes?

Which of the following expressions is equivalent to -1/4y - 2 1/4 + 1/2 (4-2y)? a. -3y + 2b. -3 1/2+4c. -4 1/2y+2d. -4 1/2y+2show ur work

What weather system might be occurring if the pressure gradient decreases and fish harvests in peru are weaker than normal

Which hot air mass brings hot humid weather and air mass