RECORDS Olympia listened to some old records. The first song lasted 2 minutes and 12 seconds, the
second lasted 2 minutes and 16 seconds, the third 2
minutes and 18 seconds, and the fourth 3 minutes
and 4 seconds. Use mental math to determine the
total playing time for all four records.
pls

the answer is (2x+8)²= 16

d

step-by-step explanation:

- "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."