Which of these situations represents opposite quantities that combine to make 0?

a tennis ball is thrown 15 feet into the air. the tennis ball falls 15 feet back to the ground.
a football player runs 5 yards and then 5 more yards.
six apples are put in a bowl. three of them are eaten.
a sandwich is cut into two equal pieces.

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation:

answer is c

step-by-step explanation:

81/12=324/x

x=48