Use the function f(x) to answer the questions:

f(x) = 4x2 + 8x − 5

Part A: What are the x-intercepts of the graph of f(x)? Show your work. (2 points)

Part B: Is the vertex of the graph of f(x) going to be a maximum or a minimum? What are the coordinates of the vertex? Justify your answers and show your work. (3 points)

Part C: What are the steps you would use to graph f(x)? Justify that you can use the answers obtained in Part A and Part B to draw the graph. (5 points)

Part A. (-5/2,0) (1/2,0)

Part B. The vertex will be a minimum. (-1,-9)

Step-by-step explanation:

A. The x intercepts are the two points that the function intersect with the x axis.

B. The lowest or highest point is the vertex. With this function the vertex is the minimum.

C. To graph this you need the roots and the vertex. Once you have those plug in any number into the equation to get one more point. Once you have that point you should be able to see the whole function on the graph.

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation: