Using the SUBSTITUTION method, Vito is solving the following system of equations algebraically: y = -3x - 4 AND 2x - 3y = -21 *

Which equivalent equation could Vito use?
1) 2-3x - 4) + 3x = -21
2) 2(3x – 4) + 3x = -21
3) 2x-3-3x - 4) = -21
4) 2x - 3(2x - 4) = -21

If a translation of t-3,-8(x, y) is applied to square abcd what is the y-coordinate of b'? the y-coordinate of is 43 mark this and return save and exit next submit

A(1,1) b(-3,0) c(-4,-1) d(3,-2) drag it to correct position

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