A group of 16 adults and 25 children go to a show. The total cost of tickets was £315.40.
A child's ticket cost £6.60.
Find the cost of a ticket for an adult.

Solve the equation for x. 50(4x + 12) = 200

20 if (08.02 mc) a of is : y = 6x − 4 y = 5x − 3 a: in ,of .y-on to . (6 ) b: is to of ? (4 )

In a gallup poll, 750 randomly selected adults were asked whether they are in favor of the death penalty for a person convicted of murder, and 75% of them said that they were in favor. construct and interpret a 99% confidence interval of the percentage of all adults who are in favor of this death penalty. round to 2 decimals.