SOLUTION: The work principal states that if on person can do a job in time �a� and another can do the same job in time �b� that they can do the job together in time �t�. This is demonstrated

Question 84664: The work principal states that if on person can do a job in time �a� and another can do the same job in time �b� that they can do the job together in time �t�. This is demonstrated by the equation:
1 + 1 = 1
a b t
Write the expression in terms of a:
And then use t = 5 hours and b = 8 hours, approximately what is a?

Answer by funmath(2933) (Show Source): You can put this solution on YOUR website!
The work principal states that if on person can do a job in time �a� and another can do the same job in time �b� that they can do the job together in time �t�. This is demonstrated by the equation:
1 + 1 = 1
a b t
Write the expression in terms of a:

LCD=abt Multiply each term by the LCD and clear your fractions.

solve for a

And then use t = 5 hours and b = 8 hours, approximately what is a?

a=13 1/3 hrs or 13.333 hrs or 13 hrs (1/3)(60)min=13hr and 20 min
I don't know what form of an aswer that your teacher prefers, they're all valid answers.
Happy Calculating!!!
RELATED QUESTIONS
The work principal states that if one person can do a job in time 'a' and another can do... (answered by checkley71)

If Harry can do a job in 2 days, and Sally can do the job in 4 days, and Henry can do... (answered by stanbon)

A Ricoh copier can complete a job in 10 minutes. A xerox machine can do the same job in... (answered by ankor@dixie-net.com)

One person can do a certain job in ten minutes, and another person can do the same job in (answered by stanbon,ikleyn)

One person can do a certain job in one-half hour, and another person can do the same job... (answered by nerdybill)

One person can do a certain job in twenty-one minutes, and another person can do the same (answered by checkley71)

One person can do a certain job in 15 minutes, and another person can do the same job in... (answered by Maths68)

John can do a job in 4 hours and Mark can do the same job in 2 hours. If they work... (answered by Cromlix)

Machine A can do a certain job in 8 hours. machine B can do the same job in 10 hours.... (answered by stanbon)