The probability of rolling a 6 on a biased dice is 1/5 work out the probability of rolling two sixes

Bruce is getting materials for a chemistry experiment his teacher gives him a container that has 0.25 liter of liquid in it.bruce need to use 0.4 of this liquid for the experiment. how much liquid will bruce use?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

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).