Can I get help with number 15 am stuck

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?

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

Solve 13 + w/7= -18 (w/7 is a fraction)