Afarmer noticed that his chickens were loose and were running around with the cows in the cow pen. he quickly counted 100 heads and 270 legs. how many chickens did he have and how many cows?

What is the anwers for 9+2x=5x-3-x

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

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.