Which statement is true about 21 and 22? (1 point) 1)
21 and 22 are complementary, because they are a pair of adjacent angles.
2)
21 and 22 are supplementary, because they are pair of adjacent angles.
3) Z1 and 22 are complementary, because they are a pair of corresponding
angles.
4) 1 and 22 are supplementary, because they are pair of corresponding
angles.

second statement is true.

1 and 2 are supplementary , because they are a pair of adjacent angles.

yes the total will be same because in both of them the expression.is rearranged but their sign remains the same hence it hss just been shuffled

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."