Please help, it would mean the world

What is the missing constant term in the perfect square that starts with x^2 -20x

Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm

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?