F(x)=x^2-3x+18the value of discriminant of f

Which shows the image of rectangle abcd after the rotation (x, y) → (–y, x)?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

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