Can someone help me with all this questions no other links

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

Graph g(x)=2cosx . use 3.14 for π . use the sine tool to graph the function. graph the function by plotting two points. the first point must be on the midline and closest to the origin. the second point must be a maximum or minimum value on the graph closest to the first point.

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?