A dolphin is underwater. Its position below sea level changes by -42.5 ft in 5 minutes. What is the average change in the dolphin's position each minute?

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

There is a spinner with 14 equal areas, numbered 1 through 14. if the spinner is spun one time, what is the probability that the result is a multiple of 2 or a multiple of 5?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?