Does anyone have any idea on how to label these

Combine like terms. do not forget to use the distributive property to simplify the first term. 2(3y + 5k) - 2k

Rainbow trout is non- native to the united states. however this species is breeding with the native gula yltrout acientistrecently observed that the hola trout were becoming exitinct what is the cause of their extinction

Which of the following regions suffers the most from acid rain? a. the area around vancouver c. the area below atlanta b. the area below detroit d. the area above montreal