SOLUTION: B. It takes 900 tiles to tile a roof. The previous day 150 tiles were taken up to the roof. You can carry 25 tiles up to the roof every 2 minutes. Write an algebraic expression rel

Algebra ->  Human-and-algebraic-language -> SOLUTION: B. It takes 900 tiles to tile a roof. The previous day 150 tiles were taken up to the roof. You can carry 25 tiles up to the roof every 2 minutes. Write an algebraic expression rel      Log On


   

Question 1002601: B. It takes 900 tiles to tile a roof. The previous day 150 tiles were taken up to the roof. You can carry 25 tiles up to the roof every 2 minutes. Write an algebraic expression relating the total number of tiles on the roof to the time spent carrying them up there on this day. How long will it take today to carry all the tiles needed to tile the roof completely?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
If +t+ = time in minutes spent on the roof,
+t%2F2+ = number of 2 minute intervals
spent on roof
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+25%2A%28+t%2F2+%29+ = number of tiles on roof
For 900 tiles on roof:
+25%2A%28t%2F2%29+=+900+
+25t+=+1800+
+t+=+72+
Since +72+=+60+%2B+12+,
It takes 1 hr and 12 minutes to get ehough
tiles on the roof to finish it