There are 80 runners to start a race. in the first half of the race, 1/4 of them dropped out. in the second half of the race , 1/5 of the remaining dropped out. how many runners finished the race?

An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.

Rounded to the nearest tenth, what is the value of x

The graph of f(x) is obtained by reflecting the graph of f(x)=-3|x| over the x-axis. which equation describes f(x)? a) f(x)=3|x| b) f(x)=|x+3| c) f(x)=-3|x| d) f(x) = - |x+3|