Point a and point b lie in the coordinate plane what is the midpoint between a (7,-5) and b (9,-1)

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15

How can you construct perpendicular lines and prove theorems about perpendicular lines

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample