How can rounding or compatible numbers help you check your work when you divide?

Adifferent website gives the cost for the first train as £56.88 and the second train as £20.11 with a £9.50 charge for cycle storage for the whole trip. how much would the journey cost you?

Average acceleration: i have no idea how to do this.

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles