Answer:
x(x+4)(x−4)
Step-by-step explanation:
Factor x3−16x
x3−16x
=x(x+4)(x−4)
what do you need help with (no pic or no question)
Answer: 
Step-by-step explanation:
Given
Sample of 12 measurements has a mean of 16.5 and
a sample of 15 measurements has a mean of 18.6
Take
be the mean and no of measurements
and
be the mean and no of measurements in second case

Similarly,

Mean of 27 measurements

A. Thay intersect at one point.