Sin78 ×cos42+cos78×sin42 evaluate without the use of a calculator

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?

Find the maximum value of p= 4x + 5y subject to the following constraints :

Select the point that is a solution to the system of inequalities. y< =-x+3 y=x^(2)-3x