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two trains leave the station at the same time, one heading west and the other east. the westbound train travels at 55 miles per hour. the eastbound train travels at 75 miles per hour. how long will it take for the two trains to be 208 miles apart?
do not do any rounding.

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Dylan is evaluation the expression 13+19+7+10 at one step in his work, dylan rewrites the equation as 13+7+19+10 which property of addition must dylan have used when he evaluated the expression?