Free points think fast 2+2

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?  

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?