Amir subtracted a quantity from the polynomial 3x2+8x−16 and produced the expression x2−4. What quantity did Amir subtract? Explain how you got your answer.

What is the sum of these mixed numbers 2 1/8 + 4 3/8

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

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.