How many ways can Elena choose 4 songs from a list of 15 if the order of the songs is important?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

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?

Parallelogram efgh is a rectangle. he = 6, and fe = 8. find ge: and find fj: