Brian drove 120 miles at speed of 60 miles per hour. he drove the same distance back home at average speed of 40 miles per hour. what is his average speed?

Average speed = Total distance/Total time.

First drive:

120/60=2 (distance/rate=time)

Second drive:

120/40=3 (distance/rate=time)

Average:

Total time=120+120=240

Total time=3+2=5

Average speed = Total distance/Total time=240/5=48

His average speed was 48 mph.

in 1995, potato plants were taken into space aboard the space shuttle columbia.

step-by-step explanation:

easy its decreasing

step-by-step explanation:

because its top point is at the to of the graph on the left side (atleast from the veiw i see it) now if that top point wast in the lower part of the graph it would be increasing hope this have a nice day