Evaluate 2(x+1)-3 when x=6

Add the fractions and simplify 1/2+ 1/3

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.

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.