The cost of a telephone call is $0.75 + $0.25 times the number of minutes. write an algebraic expression that models the cost of a telephone call that lasts t minutes

Find the difference (8ab+a+2) - (3ab+6)

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?  

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.