What kinds math is this ?
3x+2x-2+y

Nscience we assume that the force of gravity behaves the same way beyond earth. using this assumptions, we can use the gravitational forces from the sun and moon to explain a: the tides b: a lunar eclipse c: the length of a day d: the revolution of the earth hurry i am timed : ) will give brainliest

Facts/data/information/reason to prove the us is democratic

Why are radio observatories located in valleys far away from urban centers? a. to shield them from electromagnetic interference b. to avoid sound pollution c. to avoid disturbing people living in the city d. to shield them from water vapor