Q. If heights of 3rd graders follow a normal distribution with a mean of 52 inches and a standard deviation of 2.5 inches, what is the z score of a 3rd grader who is 47 inches tall? A. z=-5
B. z=-2
C. z=2
D. z=5

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

What does the sign of the slope tell you about a line?