Amy practice saxophone two times during the week for 3/4 hours and then on saturday for 1 1/2 hours how many hours during the week did she practice?

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

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