The situation that describes opposite quantities that when combined would equal 0 is:
Eileen moves seven spaces forward, then she moves seven spaces back in a game.
This situation shows that the forward movement (7 spaces) and backward movement (7 spaces) cancel each other out, resulting in a net change of 0.
Another correct option is:
Sarah is charged a fee of $20 and withdraws $20.
In this case, the $20 fee (a negative quantity) and the $20 withdrawal (also a negative quantity, as it’s going out) also net to 0 when combined.
Both options lead to a net effect of zero.