I'm putting as many points as i can on this. i have no idea where to put it and i've been stuck on this problem for the last 50 minutes.

Combined megan and kelly worked 60 hours.kelly worked twice as many hours as megan.how many hours did they each worked?

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

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