Question

There are two questions that I am having trouble with
one says
Emily wants 400 ml of a solution that is 11% HC1. If she has only 8% HC1 and 16% HC1, how much of each should she use?

and

On a trip, Debbie spent as much time on the train as she id on the bus. THe train averaged 50 miles per hour and the bus averaged 35 miles per hour. If she went 105 miles more on the train, how far did she go altogether?

thanks so much!

Answer 1

On a trip, Debbie spent as much time on the train as she id on the bus. THe train averaged 50 miles per hour and the bus averaged 35 miles per hour. If she went 105 miles more on the train, how far did she go altogether?

595 miles altogether

50x=35x+105
15x=105
X=7

50(7)=35(7)+105
350=245+105
350=350

350+245=595