Which measure is always the 50th percentile?

mean
median
upper quartile

Which shows the pre image of triangle xyz

Which is the graph of this function 3 square root of x plus one if

Amotorboat maintained a constant speed of 12 miles per hour relative to the water in going 45 miles upstream and then returning. the total time for the trip was 8.0 hours. use this information to find the speed of the current.