Sam has quarters and dimes in his piggy bank. He counted 37 coins that added up to $5.50. a. Write a system of equations that represents this problem. how many of each coin does he have?​

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