Acity water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from the tank so that it has 2/5 of the water that it started with?

An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.

Which of the following is true for the relation f(x)=2x^2+1

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.