Q11b (b) 79 children and 90 women buy one ticket each.
Men buy the rest of the tickets.
Work out the probability that a man buys the winning ticket.

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3

The measure of an angle is 117°. what is the measure of a supplementary angle?