two buses leave dallas at the same time and travel in opposite directions. bus A averages 58mph and bus B averages 52mph when will they be 363 miles apart? please also tell me how you set up the equation

Question

anonymous · Answer

r t = d
Solve the following for t, the time.
58 t + 52 t = 363
t = 33/10 = 3.3 = 3hrs 20 minutes after they start.

anonymous · Answer

ohh ok thanks so much!

anonymous · Answer

np

anonymous · Answer

do you want to help me with another one? lol

anonymous · Answer

OK

anonymous · Answer

there is no closure property of division that applies to integers. ex: 2 divided by 3 is not an integer. what is another example of a set of real numbers that does not have a closure property for one of its basic operations? give an example to illustrate your claim.

anonymous · Answer

I am guessing on this one.$$\sqrt{2} $$

anonymous · Answer

but shouldnt it be {+ - x or/}?

anonymous · Answer

http://www.abstractmath.org/MM/MMIntegers.htm Refer to the above where they cover +, -, * and /.

anonymous · Answer

thanks!

turingtest · Answer

The set they are asking for is then the set if irrational numbers.
This set is not closed because$$\sqrt{2}*\sqrt{2}=2$$therefor the product of two irrational numbers may be rational.

turingtest · Answer

The set of imaginary numbers is not closed either, I'll leave it up to you to show that.