What is the sum of the polynomials?
(-x2 + 9) + (-3x2 - 11x +4)

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Anew shopping mall is gaining in popularity. every day since it opened, the number of shoppers is 5% more than the number of shoppers the day before. the total number of shoppers over the first 10 days is 1258 how many shoppers were on the first day?

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).