An internet service provider charges ₱ 1.2 for the first minute and ₱ 0.8 per minute for subsequent minutes of a call. If duration of connection is represented as x, and amount charged is represented as y, find the linear equation for this relationship.

ABCD is a parallelogram with E and F as the mid-points of side AB and CD. Line segments CE and AF intersect the diagonal BD at point P and Q respectively. Find BD.

The area of a trapezium is 122.5 cm^{2} and the distance between its parallel sides is 5 cm. If one of the parallel sides is of length 29 cm, find the length of the other side.

Two chords AB and AC of a circle subtends angles equal to 100º and 30º, respectively at the centre. Find ∠BAC, if AB and AC lie on the opposite sides of the centre.

A survey of ^@ 600 ^@ students of a school was conducted and it was found that ^@210^@ students like tea while ^@390^@ dislike it. Out of these students, one student is selected at random.
What is the probability that the selected student does not like tea?