Answer:
Step-by-step explanation:
The required answer is the rate at which Machine A works when the two machines are combined.
Note: the rate of doing work is express as
Hence we can conclude that Machine A working rate is
and machine B working rate is
When the two machine works together, the effective working rate is
The fraction of the work that Machine B will not have complete because of Machine A help is the total work done by machine A
Hence the fraction of work done by A is expressed as
Hence the fraction of the work that Machine B will not have complete because of Machine A help is the total work done by machine A is 
Answer:
3
Step-by-step explanation:
You might just think that I subtracted but on the triangle the last side is the base which is always smaller.
Answer:
none of the above because if each tick equalls one there is a letter at -2 not -1
Step-by-step explanation:
Answer: many people believe because Albert Einstein published a book in 1915 about the earth and the current description of gravitation in modern physics.
but because go and satan made the good and bad things one by one they created the earth with the evil and the good on each side
Step-by-step explanation:
Answer:
7
Step-by-step explanation:
If he takes 7 hours, she would take 7 hours doing it at the same pace
