Write an explicit formula for an arithmetic sequence whose common difference is -4.5.

Let hh represent the number of hummingbirds and ss represent the number of sunbirds that must pollinate the colony so it can survive until next year. 6h+4s > 746h+4s> 74 this year, 88 hummingbirds pollinated the colony. what is the least number of sunbirds that must pollinate the colony to ensure that it will survive until next year?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex