Astudent is trying to solve the system of two equations given below:

equation p: y + z = 6
equation q: 3y + 4z = 1

which of the following is a possible step used in eliminating the y-term? (1 point)

(y + z = 6) • 4

(3y + 4z = 1) • 4

(y + z = 6) • –3

(3y + 4z = 1) • 3

which  best  describes the transformation from the graph of  f(x) =  x2  to the graph of  f(x) = (x  – 3)2  – 1?   left 3 units, down 1 unitleft 3 units, up 1 unitright 3 units, down 1 unit  right 3 units, up 1 unit

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

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22