Jane fills her empty car with 12 litres of petrol. After driving for the day the car now has 7.5 litres of petrol in the tank.

Calculate the percentage decrease of petrol in the car.

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

What is the probability of throwing several dice with sum equal to 6 (six)? show the ways of possibilities for sum 6 (as the numerator) and the ways of throwing n dices for n = 1, 2, 3, 4 or 5 as denominator for all the questions to earn full credits. (a)throw one die, (b) throw two dice, (c) throw three dice (d) throw 4 dice, (e) throw 5 dice

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)