Moe is 8 years older than Zach. If twenty years ago Moe was 3 times as old as Zach, what are their present ages. Moe: 32 Zach: 24

Please include the steps taken to get the answer.

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

The ratio pv to nrt is plotted against pressure for ch4 at 0°c and 200°c. why does the curve for 0°c drop below the horizontal line for an ideal gas whereas the curve for 200°c does not?

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.