Which best describes the system made up of the lines y=2/3(x)-5 and y=-2/3(x)+7? *

What is the result of the greenhouse effect? a. heat is deflected from the atmosphere. b. heat is released from the atmosphere. c. heat is kept in the atmosphere. d. plants are able to grow in the tropics where the air is the heaviest.

According to the earth science reference tables, during which geologic time period were the continents of north america,south america, and africa closest together?

If scientists only detect p waves in a certain layer of earths interior what does that tell us?