Answer:
2x+9 when x equals 3 is 2*3+9
=15
Explanation:

Answer:
Climate can have many effects on vegetation. An example of this is vegetation growth and survival. Numerous species of plants need a specific climate in order to survive. If those needs are not met, then the plant will die.
Explanation:
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False
mountains form from collision of earths plates
B. It grows as nuclear fusion in its core produces more matter.