Troy worked for 3 hours and 15 minutes. How should he write that on his time
card?

If 3x+8=3x+8 is it one solution or no solution

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?