Interesting problem. When computers first came out (when dinosaurs ruled the planet), we had to deal with problems that were many brackets deep. So this has practical applications.
Start at the very right and keep on removing brackets and collecting like terms.
5a - {3b - 5[a - (b - 4a)]} I just changed the sign on the right bracket. 5a - {3b - 5[a - b + 4a]} 5a - {3b - 5[5a - b]} Now deal with []. You are still on the right. 5a - {3b - 25a + 5b} 5a - {8b - 25a} Finally remove {} 5a - 8b + 25a 30a - 8b If you can solve another like this, you are well on your way to being good in computer science.
I’m not sure but i think 66 hours because both pumps must fill half of the pool which would split the timing for each which would make pump 1 take 36 hours to fill half and pump two take 30 hours to fill the rest. when you add these hours it equals 66. i hope i helped :)
The standard form of the equation of a circle is: Where the point (a,b) represents the centre and r is the radius. So, given your information, the equation will be:
