Evaluate p/2 - 5 when p=14 (p/2 is supposed to be a fraction. p over 2.)

2

Explanation: The letter p stands for a number. Think of it as a placeholder or a box to put the number inside. In this case, we place 14 inside this box. We divide p over 2, so we divide 14 over 2 to get p/2 = 14/2 = 7

Then we subtract off 5 to get (p/2) - 5 = (7) - 5 = 2 which is the result of the evaluation when p = 14.

- "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."