Answer:
Answer is attached in images
Step-by-step explanation:
Given:
x+z=1 and

Now,

Which is circle with center (1/2,0) radius
take, 
Now,
Answer:
3.666666666666667
Step-by-step explanation:
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 