Can someone help me plz!!

Use set buikder notation to represent the following set: {, -2, -1, 0}

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.

The square root of 9x plus 7 plus the square rot of 2x equall to 7