Reaghan solved the following word problem: "Amanda has (20x + 6) dollars to spend. She purchased one book for (5x + 2) and two notebooks for (x - 3) each. How much money does Amanda have left over after she purchased the one book and two notebooks?" Reaghan's incorrect work is shown below. Explain what was Reaghan's mistake and solve the problem correctly in the Show Your Work section.

1. d.90

2. e. none of these (80)

3. a. 0

4. b. 6

5. e. none of these (10)

6. a. 5

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.