The explicit formula of a sequence is f (x) = 2x^2 where x Ethe natural numbers. The recursive formula can be written as f(x) = f (x - 1) + 4x + b. what is the value of b?

Carly bought a new house for $125,000. the value of the house appreciates approximately 3.5% each year. what will be the value of the house after 10 years?

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?  

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?