At a ballroom dancing lesson there were twenty-three students. deena danced with six boys, chloe with seven, moira with eight and so on for all the girls up to the last girl, anna, who danced with all the boys. how many boys were at the lesson?

1. what is the phythaforean theorem? 2.what do we use it for? 1.what is the distance formula ? 2.what do we use it for?

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.

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?