Which one of the following examples represents a proper fraction?
a. 8/8
b. 12/9
c. 3/2
d. 15/22

Find the value of x for which the lines are parallel.

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.