Determine the equivalent system for the given system of equations. 4x - 5y = 2
10x - 21y = 10

answer options:

A. 4x - 5y = 2
3x - y = 4

B. 4x - 5y = 2
24x - 47y = 22

C. 4x - 5y = 2
24x - 47y = 22

D. 4x - 5y = 2
14x + 26y = 12
PLEASE help

Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas is (0,-12). the y intercept of the second parabola is (0,-24) what is the positive difference between the a values for the two functions that describe the parabolas