A) (x + y +z) x (x - y) + (x - y - x) * (y – z)

When something is moving, it is in motion. pressing the gas pedal in a car will put the car in motion. two important properties of motion are speed and direction. speed is how fast an object is moving. tony and tanya both run for the same amount of time, in the same direction. tanya runs much further than tony in that time. how does tony's speed compare to tanya's speed? a) their speed is equal. b) tony is slower than tanya. c) tony is faster than tanya. d) without a stopwatch, you can't say for certain.

Whether or not a given study has the possibility of causing harm to participants:

These facilities were organized and sponsored by churches or charities during the great depression in an effort to feed the homeless and needy.