How many different ways can four people: andy, betty, cindy, and doug, sits in a row at the opera if andy and betty must sit together?

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a. p.