What is the least integer value in the solution set to 7(3x - 1) = 4*?

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Using elimination, what is -4x+2y=-12 4x+8y=-24

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min