The distance in miles, y, a runner travels in x hours can be modeled using a linear
function. One runner runs for at most 5
hours at a constant rate of 8 miles per
hour.
What is the domain of the function for
this situation?

i think that you should ask google for the answer to that problem because if we don't know it google does

12 dolars one is cheaper becasue 3 pairs is 6 means is sock is 2 while the 12 is cheaper

the difference of two squares is a special form that has a factorization worth memorizing.

a² - b² = (a - b)(a + b)

your equation can be factored as

x² - 16 = 0

(x - 4)(x + 4) = 0

the zero product rule tells you the solutions are the values of x that make these factors zero: x=4, x=-4.