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

Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189