A train leaves at 10.12 and arrives at its destination at 11.18. If the train travelled 74 km, what was it's average speed in km/h?
Give your answer rounded to 1 dp.

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?