The lengths of the sides of a triangle are in the extended ratio 2:4:5. The perimeter of the triangle is 77in. What is the length of the longest side?

Does anyone know how to do geometryme with this problem

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.

Hi, can anyone show me how to do this problem? 100 points for this. in advance