What number must be multiply -2/3 to get a product of 3/4?​

Acable car begins its trip by moving up a hill. as it moves up, it gains elevation at a constant rate of 50 feet/minute until it reaches the peak at 2,000 feet. then, as the car moves down to the hill’s base, its elevation drops at the same rate.

Find the value of the variable and the length of each secant segment

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5