M + 4.5 / –1 = –0.6 what is m

time is equal to distance over rate so

t = d/r

need a little bit more information for the second question.

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.