# Elementary Algebra Question(30)

label Algebra
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Can I have help on the 30th question from this link please?

May 18th, 2015

1.   50/2  -(5-11)^2

25 - (-6)^2 = 25-36 = -11  (Answer)

Dear student : I can solve all of them but \$1 is very very less for all 30 questions .... If you can allow to complete the same I will complete in few hours for \$30

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May 18th, 2015

I only needed help just on the 30th question. The other problems I can do.

May 18th, 2015

May 18th, 2015

Its fine. Thank you for helping out with the question. I'll be practicing it.

May 18th, 2015

Let the speed of Fright train is  x miles/hr than speed of passenger train will be = 2x miles/hr

Distance traveled in Fright train = 350 miles   hence travel time by fright train = distance/speed = 350/x hrs

Distance traveled in Passenger train = 700 miles, hence travel time by passenger train = distance/speed = 700/2x = 350/x hrs

since total travel time is 20 hrs therefore

350/x + 350/x = 20

or 700/x = 20

solving we get , x = 700/20 = 35 miles/hrs

hence Average speed of Fright train = 35 mils/sec

& Passenger train = 2 * 35 = 70 miles /sec        (Answer)

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May 18th, 2015
Nov 22nd, 2017
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