Evaluate the expression for g = 6 and h = -1. gh − 3 =
2 answers:
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Answer/Step-by-step explanation:
A. Distance travelled at constant rate = 180 miles
Rate of travel (r) = distance travelled (d) /time (t)
Travel time (hrs) ==> rate of travel (miles/hr)
5 ==> 180/5 = 36
4.5 ==> 180/4.5 = 40
3 ==> 180/3 = 60
2.25 ==> 180/2.25 = 80
B. t = time travelled in hrs,
r = rate (miles/hr)
d = distance travelled = 180
Therefore, rate travelled for t hours would be:
One of the numbers is 40 and the other one is 63
confirmation:
63×(2/3)-2=40
and 40+63=103
confirmation:
63×(2/3)-2=40
and 40+63=103
Computer A can carry out analysis in 6 hours. That means in an hour, computer A does 
of the job.
Computer B can carry out analysis in 4 hours. That means in an hour, computer B does
of the job.
If both computers work together, in an hour they do:
In an hour, they do
of the job.
To finish the job, they need
hours.
hours
= 2.4 hours
= 2 hours + 0.4 hour
= 2 hours + 0.4 × 60 minutes
= 2 hours 24 minutes
They finish analysing in 2 hours 24 minutes
Computer B can carry out analysis in 4 hours. That means in an hour, computer B does
If both computers work together, in an hour they do:
In an hour, they do
To finish the job, they need
= 2.4 hours
= 2 hours + 0.4 hour
= 2 hours + 0.4 × 60 minutes
= 2 hours 24 minutes
They finish analysing in 2 hours 24 minutes