its 10 points

c and d cause each Px = 4 for c and 10 for d.

**Answer: -x^2 **

**Step-by-step explanation:**

-1 times x^2 is the same as -1(x^2)

-1(x^2) = is the same as -1x^2 or -x^2

**Answer:**

12

**Step-by-step explanation:**

**Answer:**

I believe it is 9.3%. Im pretty sure but i suggest someone check it just to be sure but i would go with this.

**Answer:**

7.5

**Step-by-step explanation:**

9. So we know the length of a rectangle is the length * width.

The width of each of the triangles is 1 (difference in x-value). And the height is the point on the graph that it is touching.

The height (y value) of the rectangles are 1, 2, 2, 2, 1/2

So the area of the rectangles will be:

(1+2+2+2+1/5)1 = 7.5