(−7a2b3+3a3b−9ab)+(4a2b3−5a3b+ab)
how would I get the answer

The highest point on earth is the peak of mount everest if you climb to the top you would be approximately 29,035 feet above sea level at remembering that amount is 5280 feet percentage of the height of the mountain would you have to climb to reach a point 2 miles above sea level

The variable in a relation who’s value depends on the value of the independent variable is called what?

Need on this one asap im almost done with this subject