Answer:
85 bolts.
Step-by-step explanation:
The work rate of a machine is given by the job completed per time:
. If your problem has multiple machines working together to complete a job, you should sum their work rates:
In the problem given:

To solve the equation system for
, you could subtract the first and last equations:

Then,
.
Answer:
three consecutive numbers that add up to 84 are 27,28 and 29
Step-by-step explanation:
27+28=55
55+29-=84
28 divided by 2, which is 14.
Answer: 462
Step-by-step explanation: