Are you asking questions (2) and (3) of question 8? I think your question (1) is right. . .

(2).A: y=- 12.5x+25(0≤x≤2)

B: y=-8x+20(0≤x≤2.5)

(Just write the function expression according to the figure, and note the value range of X)

(3) When x= 10/9, the heights of Party A and Party B are equal, both of which are 100/9 (only-12.5x+25 = -8x+20).

When 0; -8x+20 is enough)

When 10/9

The above three results can also be seen from the image that when the line segment of A is higher than B, A is higher than B, and vice versa, the x corresponding to the intersection of two line segments is 10/9.