❌❌Please help!! ❌❌
Branliest!!

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Find the coordinates of point x that lies along the directed line segment from y(-8, 8) to t(-15, -13) and partitions the segment in the ratio of 5: 2.

Factor the polynomial. b^2 + 4b + 4