It costs $859.32 to have a school dance (tickets $8) a. how many tickets must be sold to cover the cost? b. how many tickets must be sold to make $980.68 profit?

Which shows one way to determine the factors of  x3  +  5x2  –  6x  –  30 by grouping? x(x2  –  5)  +  6(x2  –  5)x(x2  +  5)  –  6(x2  +  5)x2(x  –  5)  +  6(x  –  5)x2(x  +  5)  –  6(x  +  5)

Nnnnneeedd 1.find the residual if you know the actual number is 5.2 and the predicted value is 4.8

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x