In the scientific method before conducting an experiment it is necessary to

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.

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

See attachment below and find the equivalent of tan(∠qsr)