There are 20 purple or yellow marbles in a bag. The number of purple marbles is 4 less than 2 times the number of yellow marbles. How many purple marbles are in the bag? How many yellow marbles are in the bag?
*show work* pleaseee

12 purple marbles and 8 yellow marbles

Step-by-step explanation:

If you double 8 and subtract 4 you get 12 which can be added with the 8 to get 20.

- "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."

answer4 to the second power is 16

and 4 to the third power is 64,