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heshamelaziry
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Johnny travels a total of one hour to and from school. On the way there he jogs at 5 miles per hour and on the return trip he gets picked up by the bus and returns home at 20 miles per hour. How far is it to the school?
a) 2 miles
b) 4 miles
c) 4.8 miles
d) 8 miles
e) 10 miles
A) The Algebra Student says: I will work with the rates and I can see that one is four times the other in terms of time, because D=R*T (Distance = Rate X Time). I know they are inversely related. So 5T= 1 hour. Therefore T=.2 hours. I can take either the bus speed or the bicycle speed and plug in: 20 miles an hour multiplied by .2 hours results in 4 miles. We check the work and we are right.
How is it that 5t=1 ? where is the inverted relationship. I am totally lost.....
a) 2 miles
b) 4 miles
c) 4.8 miles
d) 8 miles
e) 10 miles
A) The Algebra Student says: I will work with the rates and I can see that one is four times the other in terms of time, because D=R*T (Distance = Rate X Time). I know they are inversely related. So 5T= 1 hour. Therefore T=.2 hours. I can take either the bus speed or the bicycle speed and plug in: 20 miles an hour multiplied by .2 hours results in 4 miles. We check the work and we are right.
How is it that 5t=1 ? where is the inverted relationship. I am totally lost.....
