Consider the function f(x) = x2+ bx-16 , where b is a constant. If the function has an axis of symmetry at
x
=
5
, what is the value of b ?

Ineed to learn how to solve this problem

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52