The perimeter of a rectangle is (12r +20) cm where its length is 2 cm more than the width. find the width

Step-by-step explanation:

In this equation, P stands for “perimeter,” l refers to the length of the rectangle, and w refers to the width of the rectangle. Length always has a greater value than width. Because opposite sides of a rectangle are equal, both lengths will be the same and both widths will be the same.

- "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."