Answer:
5.92 min
Step-by-step explanation:
1/11 = person A's rate
1/21 = person B's rate
1/33 = person C's rate
Let t = time working to gether
rt = am't of work done
(1/11)t = work done by person A
(1/21)t = work done by person B
(1/33)t = work done by person C
(1/11)t + (1/21)t + (1/33)t = 1
231((1/11)t + 231(1/21)t + 231(1/33)t = 231
21t + 11t + 7t = 231
39t = 231
t = 5.92 min
I did that in super detail for you. Note: If n = the time to do a job alone, then 1/n = the rate of speed in doing the job. And, the rate times the time on the job = am't of work done.
Answer:
-7
Step-by-step explanation:
because 15-22= -7
he started at 0, gained 15 points but then lost 22, so after the two problems he'd have a score of -7.
Answer:d i believe
Step-by-step explanation:
if im wrong i will get hate comments, im already hated by everyone so it dont matter
