Tracy and Dave together complete the task in 
hours
Given Tracy alone take 8 hours to complete work and dave alone take 12 hours to complete the work.
Let's say together they worked in x hours
⇒in 1 hour they worked 
th part of the work
Tracy herself worked 8 hours to complete the whole task
⇒ in 1 hour Tracy completes 
th part of the task
Dave himself worked 8 hours to complete the whole task
⇒ in 1 hour Dave completes 
th part of the task
By proportions
⇒+= { using operation addition}
⇒ x=
Therefore,Tracy and Dave together complete the task in hours
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Answer:
2 Hours
Step-by-step explanation:
14+6+6 = 26.
You start with 14, and add on 6 which gives you your starting total 20. So that's one hour. then you add another hour, adding on another $6 making the total $26 and two hours of renting time.
Un significant figured Volume=1099.56
3 sf = 1100.00
Answer:
A = 140
Step-by-step explanation:
Area of a triangle:
A = 1/2bh
Given:
b = 20
h = 14
Work:
A = 1/2bh
A = 1/2(20)(14)
A = 10(14)
A = 140
